I think the problem with the OI and HC bosses is they build upon the original games' bosses...by making them worse. I think the Octopus looks cool, but the platforms falling down, the projectiles from the arms, I just think they needlessly complicate what was already a refined boss (avoid the projectiles and then attack Eggman when he becomes vulnerable). The second part of the HC boss is even more egregious, because it's exactly the same as the Sonic 3 boss except it's placed higher so it's harder to jump into it, which just makes it a more tedious waiting game. One of the problems I have with the Mania bosses is they don't want you to hammer away at the bosses and beat them in 30 seconds. But in reaching that goal, they often just have you wait around tediously for the boss to become vulnerable. Also, on the HC boss, I think I'll say this because I think it's funny for us hardcore fans to consider. But my mum actually played Sonic Mania! She hasn't played Sonic 3 since maybe 2001. But when she got to the HC boss she said "ah I remember this, they are just reusing this again". I don't think she remembered Hydrocity honestly, but the boss is so memorable even she remembered it. And she actually remembered how the old boss played and complained that this one was more tedious. Lol.