Hot take
-Frontiers is actually fun, its only real problem comes from not letting it have time to cook. It's story is fine, but flawed, many good parts, but also a lot of dumb parts. the only 'BAD' part are cyberstages which really just look ugly to me, they use the same three looks and do nothing cool.
-The best part of sadx is the hub world, if it had the same level select as sa2 it would be on the same level.
-Mecha sonic is only cool becacuse of smbz, his desgin while cool, and him using the master emerald for a boss is new, but he lost to base form classic knuckles, but he's hyped up more than he actually is.
-Sonic 3 and knuckles is overrated. it's not bad, but it's backhalf is really boring and often and feel like drag to finish.
-Superstars is bad, it's co-op is terrible, it's skins are boring and do not have proper polish, Trip has no skins despite being a playable character, Fang had little to no sway in the story despite being his grand return. The emerald powers often suck more than anything, most are only useful in specific stages, others are op in comparison, the levels either feel alright, or feel like a fan project made by a teenager. the game is half baked and is only fun when your really, really bored, and I enjoyed the game.
-Modern sonic character and desgins just plain suck, characters look to simple in the worst ways, they have the same issue as people drawing the ppg, any animal character is just sonic with slight changes and even the sonic look terrible to start, the moment it got passed heros is the moment it truly started. it's not bad at first, but the moment you just look at sonic running, focus on it, he just looks wrong, like a person in an oversized costume.
-Amy's tarrot card's are not fun to see, she uses them more as an attack in frontiers than the hammer she's used for all her life. it feels like they were read off a wiki page as something she liked and are now being forced as a part of her personality