and Amy gets treated like a self-insert character by Japanese female Sonic fans.
Is that why Amy got so bland in Current Year (same for Metal Sonic, somehow)? Because she no longer even loves Sonic, or at least doesn't show that openly. I fear the next live-action movie will force a "girlpower STRONG!" Amy that needs no Sonic, just like the Netflix Sonic show (Sonic Prime), did.
Meant it more for 06 and Forces, but I guess the comics are a better example in this case, despite the somewhat flanderized personality Silver has in those sometimes. In almost every game where he's is featured, I always felt as if Silver was meant to have a larger part in the story, specially in Forces where he's barely more than a plot device at times.
Forces was a mess in that the script was made from different pieces. As for 06, it retconned Blaze's background. Future games retconned Silver's story as well, and SEGA doesn't know what to do with those two's backstories as they keep changing.
Between his psychic powers and being of the most important assets for the Restoration, it feels as if he's just there to fill a hole instead of being a proper key player in the story.
You could say the same for Shadow, but again, Forces was made quickly.
The comics did that last part better but him being a insecure hesitant mess even in tense situation kind of drags it down.
If you mean IDW, he has an important role, yes, the same "dark future" thing I mentioned, then he kinda stays around, wondering what to do.
He needs a proper game IMO.
There has been attempts at non sonic focused games (Tails' Skypatrol and Adventure plus Knuckles' Chaotix) but it's a shame that there hasn't been any other games like them since then. A game that plays like like Castlevania PoR with two characters active at the same time that can combine attacks and swap places in real time featuring Silver and Blaze in the Sol dimension would be rather interesting.
These were done in the 90s and in one case for Shadow, and never again, sadly. Silver and Blaze are also very powerful since both have psychic powers and can fly, which means you could make a cool Metroidvania style game with both, as you say, but Team Sonic hasn't made anything too complex lately.