Kyria's statements doesn't outweigh Suzaku's feats. She likes strong people, and didn't know Suzaku was this strong. The fact that Kyria might also like people like Laxus doesn't mean Suzaku is only on his level. There's no question that Suzaku is above Laxus/Erza tiers, because his feats involve oneshotting Natsu and Erza.
Hakune took much longer to beat Natsu than Suzaku did, and most importantly there is an exploitable counter to her magic. Once you can deal with Hakune freezing your magic, then Hakune herself can easily be stomped in a fight. Had Natsu or Gray known that they needed to change the properties of their magic, they would stomp every single rematch against Hakune. There is absolutely nothing that Natsu and Erza can do to prevent Suzaku from oneshotting them if they fought again. They don't have counters to Suzaku because he's simply faster than them and hits harder than what they can tank. Also, Suzaku didn't just oneshot Natsu. He oneshotted Erza too, and then he fought Selene. This is just leagues upon leagues above Hakune beating Natsu and Gray. In fact, Gray doesn't even want any part of Suzaku. He wanted to run away as soon as he saw Erza go down.
Gildart's "cubing" technique is disassembly, and it doesn't actually kill anyone. All it does is turn them into miniature versions of themselves, which is what it did to Tenrou Natsu. Just because August is the only character to fight while cubed and reverse it later, doesn't mean you have to be August to survive this hit. You could just allow disassembly to hit you, turn into smaller versions of yourself, and then keep fighting until Gildarts gets annoyed and turns you back. This is what Tenrou Natsu did. Disassembly is not a win condition. There's no way any version of Gildarts that we've seen so far is oneshotting Natsu or Erza with casual attacks like Suzaku did. The historia of God Serena traded blows with Gildarts until he used his Empyrean finisher. Natsu and Erza have tanked attacks from Zeref and Irene. August took less damage from an attack that broke Gildart's metal arm than Selene did from Suzaku's slash.
Hakune took much longer to beat Natsu than Suzaku did, and most importantly there is an exploitable counter to her magic. Once you can deal with Hakune freezing your magic, then Hakune herself can easily be stomped in a fight. Had Natsu or Gray known that they needed to change the properties of their magic, they would stomp every single rematch against Hakune. There is absolutely nothing that Natsu and Erza can do to prevent Suzaku from oneshotting them if they fought again. They don't have counters to Suzaku because he's simply faster than them and hits harder than what they can tank. Also, Suzaku didn't just oneshot Natsu. He oneshotted Erza too, and then he fought Selene. This is just leagues upon leagues above Hakune beating Natsu and Gray. In fact, Gray doesn't even want any part of Suzaku. He wanted to run away as soon as he saw Erza go down.
Gildart's "cubing" technique is disassembly, and it doesn't actually kill anyone. All it does is turn them into miniature versions of themselves, which is what it did to Tenrou Natsu. Just because August is the only character to fight while cubed and reverse it later, doesn't mean you have to be August to survive this hit. You could just allow disassembly to hit you, turn into smaller versions of yourself, and then keep fighting until Gildarts gets annoyed and turns you back. This is what Tenrou Natsu did. Disassembly is not a win condition. There's no way any version of Gildarts that we've seen so far is oneshotting Natsu or Erza with casual attacks like Suzaku did. The historia of God Serena traded blows with Gildarts until he used his Empyrean finisher. Natsu and Erza have tanked attacks from Zeref and Irene. August took less damage from an attack that broke Gildart's metal arm than Selene did from Suzaku's slash.