I think the main problem I had after the Winner vs Loser Arc was lacking a future destination. In the original PoT, Seigaku had a clear goal of going to Nationals, so all the matches felt like road stops that had to make. In SPoT, all the shuffle matches didn't seem that important until we learned of the G10 and the World Cup. Now the characters have something worth fighting for other than just a higher rank.
I don't really agree with this - or well, "agree." Can't tell you that the way you felt about it is wrong of course, but in my eyes it was always pretty clear that there were going to be international matches and the like considering the traveling team is mentioned in the very first chapter. So while it was never directly said that there was going to be a WC, I'd still say it was strongly implied.
Also, I haven't actually answered thread question yet. Not gonna do X/10 ratings because they feel pretty arbitrary, but at least some thoughts on each arc.
Elimination Tiebreaks: Was a solid start in my opinion, I actually only caught up after this arc was over, so I didn't have the same monthly tension as someone who experienced it as it happened. There were some nice moments and it worked well enough as re-introduction arc.
Mountain Camp: Honestly, I don't think it was too bad although most certainly the weakest arc. I reckon it was more interesting than the regular camp would've been during these in-manga days though and I liked some of the scenes, e.g. Inui and Yanagi taking on all the high schoolers by themselves.
Team Shuffle: Really good, I enjoyed it. The singles matches in particular. They weren't long, but Tezuka vs Yamato is probably still one of my favorite matches in the series and I'm glad Konomi decided to give Krauser some screen time and the flashback showing why he's even in the camp.
Vs 1st String: Another transitioning arc just like the Loser's Camp one, meant to set up the G10 challenge. It was ok for what it was and unlike apparently everyone else, I don't dislike the parallel structure. The one thing I would've liked is if the outcome of one particular match had been a bit more detailed.
Another thing I will say about the last two arcs is that I would've really liked to see 1st and 2nd court play a match. Nothing extensive of course since all those characters are very irrelevant to the story overall, but I'm still really curious about what they can do.
Vs Genius 10: I have some mixed feelings about this one. Enjoyed all the matches overall, but there were one or two points where I wish Konomi had explained some things a little better, so that we wouldn't have had to spend two years trying to guess why certain things happened the way they did. Still, Tokugawa vs Byoudouin has been my favorite match in SPoT so far I'd say, so the arc gets bonus points from me for that alone.
Vs Germany: Good. The setup with Ryoma in the US and Tezuka in Germany is very interesting and leaves room for a number of developments and I've liked all the matches so far.
