A few thing I will fore er be disappointed with this arc are the following.
1. Ikkaku not heing afforded the opportunity to have his banka repaired nor getting the special training that rukia renji etc got at the 0 division palace
2. Ichigo not utilizing more capabilities from his hollow, shinigami or quincy side. His quincy sword could have shot quincy arrows, his hollow side should utilize ceros while his shinigami side used a few hados. His other abilities can be a combination between all of his power set simultaneously. For example his banking should have the qualities of hollow (which they did) and a quincy volstanding.
3. The vizards whom became captains not USING there hollow forms especially when we found out that quincy are weak to hollow powers.
4. Not seeing hisagis bankai.
5. Shinji not using his bankai when his shikai failed against the bomb chick. And no its cap that his shikai is better in 1v1s or that it's superior to his bankai. Not only is there 0 proof of said statement but we also know that his bankai does what his shikai already does with the extra ability of tricking his foes into attacking their comrades (though he can't use this when he is with a group of his comarades). If he uses his bankai in a 1v1 match it can simply trick his opponent into hurting his or herself or tricking them into thinking that they and shinji are actually comrades since his bankai reverse the set reality within that space.
6. All parts of the soul king not becoming one again for us to visually see
7. Neither ichigos dad or uryus dad having incredible fights in the series especially in the final arc and neither of them teaming up with each other to fight a major antagonist showcasing their bankai (isshin) or volstanding (uryus dad)
1. Ikkaku not heing afforded the opportunity to have his banka repaired nor getting the special training that rukia renji etc got at the 0 division palace
2. Ichigo not utilizing more capabilities from his hollow, shinigami or quincy side. His quincy sword could have shot quincy arrows, his hollow side should utilize ceros while his shinigami side used a few hados. His other abilities can be a combination between all of his power set simultaneously. For example his banking should have the qualities of hollow (which they did) and a quincy volstanding.
3. The vizards whom became captains not USING there hollow forms especially when we found out that quincy are weak to hollow powers.
4. Not seeing hisagis bankai.
5. Shinji not using his bankai when his shikai failed against the bomb chick. And no its cap that his shikai is better in 1v1s or that it's superior to his bankai. Not only is there 0 proof of said statement but we also know that his bankai does what his shikai already does with the extra ability of tricking his foes into attacking their comrades (though he can't use this when he is with a group of his comarades). If he uses his bankai in a 1v1 match it can simply trick his opponent into hurting his or herself or tricking them into thinking that they and shinji are actually comrades since his bankai reverse the set reality within that space.
6. All parts of the soul king not becoming one again for us to visually see
7. Neither ichigos dad or uryus dad having incredible fights in the series especially in the final arc and neither of them teaming up with each other to fight a major antagonist showcasing their bankai (isshin) or volstanding (uryus dad)