First of all, Niou and Kabaji can copy most of these, correct?
Yes. There are probably some they shouldn't be able to that I haven't denoted as "cannot be copied" yet though.
What's the logic behind Free Style being negated every 2nd point?
Free Style itself isn't negated, but rather the Serves and Specials you activate are every other time you use them. The idea behind it is that you go for a lot of difficult shots which may lead to hitting winners from unexpected positions (if you want to boil it down, basically Akutsu's basic skill of being able to attack on any shot), but if you don't have Akutsu's or Ryoga's flexible movements, you'll make errors along the way too.
The Serves/Specials being negated on the 2nd, 4th and 6th try isn't set in stone in my mind - I was hesitating a lot on whether to go with those or something like 3rd and 5th try.
Aoi's comebacks affect his teammate in doubles too?
Because he could play like shit but his partner could ACE
It doesn't affect his partner, no. Maybe it'd be better to reword it based on the number of points the opponent has won.
Motion vision on Kiko? I assumed he had good reflexes and huge empathy (however the latter mixes with tennis is up to you).
Yeah, I didn't know what to do with him, and the fact that his special skill is shooting games ultimately made me decide on giving him something vision related.
I thought Volk's Iron Wall was stronger than the Aussies'.
I was considering turning his Iron Wall into a Steel Wall, but then I thought it's already quite strong as it is considering his stats (like, I don't think he can be ACE'd either way) and giving it a different name would complicate the wording of the doubles variation a bit, so ultimately I figured it'd be better to just leave it as is.
Up to speculation but I assume Ludovic's Aura would be an incomplete version compared to Camus' (only half a heart, contrary to Camus that has found his love).
Honestly I don't think he has it yet at all, I just couldn't come up with anything better for him. But I reckon he'll play his match before the league is ready, so just going to change it then and probably move the aura to his level up pool.
With Samurai, each stat increases only once permanently or does it increase every point? (For example, in the 7th point, Mental would be at +3, whereas Speed would be at +2,5 , etc).
The increases stack, yes. I used the match against Sanada as basis and found that the explanation from back then still held up quite well.
Super Attack Style could be troublesome if you want your player to be a bit passive. Is there a way for you to choose not to activate it? While this complete recklessness does fit Hewitt, I don't think it's the same case with Atobe and Federer.
The very first iteration of the Super Attack Style was actually for Atobe. It's what he did against Ryoma and in the tiebreak vs Irie. The name itself comes from the Ryoma match as well. The activation condition for Atobe's two styles are based on his play style entry in Pair Puri 1.
Regarding Albert, it just fits my idea of him I guess. In my mind he attacks from the first shot of the rally which lines up with his nickname quite well I think. I'm open for alternative suggestions though.
Shouldnt Hitouji's imitations be able to lower his opponent's support if their support level isn't high enough?
I want to include that as an Auto.
Why does Wakashi win a match by winning 3 points '-' ? Same with Akaya (and Matsu) I guess, weren't they all "victims" of comebacks?
Well, it's not just three points total, they have to win three in a row for it to work. Like I noted in Akaya's comments column, the idea is that they try to finish their matches in a low amount of real time and the best way to express that I could think of was to give them a special win condition if they managed to just dominate the opponent.
Ibu being able to perform Magic Show is cute and all but wouldn't SPOT be more appropiate to his character?
That's what I had at first, but after reading his older profiles I found it too limiting. According to them he adjusts his game plan depending on the opponent, so I wanted something more flexible. I actually had him with the same Style as Yamato at some point, but considered that to be too strong in the end.
IQ tennis seems quite worse than Data Tennis... is this intentional?
Not really. I wasn't sure whether to give Konjiki his own separate ability or start him off with the basic Data Tennis as well.
(going full in with Medanore having Italian roots?)
Yeah. And since Amadeus has Nadal's forehand, I thought it'd be fitting to give Medanore the Federer forehand.
Deep Sleep could be stronger and yeah, style adaptation could use a rework but I wouldn't delete it.
I mainly think he should only be able to use one or the other if we keep both. I don't have much of an issue with their individual effects.
Extremely minor, but even though I understand what you mean with the title "Hook shot" (...straight to Seakay's team) the name makes me immediatly think of the Hookshot in Zelda that does something completely different '-'
I borrowed the golf definition of the term, but my image of it is actually closer to the LoZ one than you might think. Basically the idea is that the way it curves forces the opponent to approach the net when trying to return it, so closing the distance between both players is a part of it.
Tohno's executions might proc too fast?
What do you mean exactly?
I understand why Leon has One Touch, but you gave up on making him darkness-ish or you are including that as autos?
It's going to be an Auto, yeah.