You are both making no sense and going nowhere. Nobody is saying Shikai doesn't increase AP. but until we see Aizen directly showing he's stronger when activating Kyoka Suigetsu, he gets nothing. A purely mental ability won't increase his AP, Shinji's purely mental ability doesn't increase AP, and Kyoraku's games don't lend him more AP unless it follows the rules of one of his games, but considering those are Hax and not him getting boosted because the rules apply to everyone else, still doesn't matter.
Not completely unsealed Aizen? Because one eye was covered? Sure, show where it's even remotely implied his power isn't at full still. And his Bankai doesn't matter exactly because he didn't use it, so it's all speculation that leads nowhere.
So we should downscale Ichigo below Aizen because... Aizen could potentially be stronger than him if he wasn't sealed, despite the fact that doesn't change the fact he's presently weaker. Or that Aizen's Reiatsu actually grew stronger despite doing nothing, while Ichigo quite literally did nothing but be a human for all that time. And where Aizen explicitly got stronger, Ichigo merely unlocked his actual power and nothing indicates he couldn't have improved after this. Of course this doesn't matter, as Aizen remains weaker than Ichigo by feats, and you've brought nothing but statements without backing.