I haven't even played Sacred Stones (besides Mekkah's troll hack) and I am starting to think it is much better designed than FE7, not because of extra features like dual-class promotion or monsters, but because they actually kept things like 3x effective Mt and apparently late game enemies are actually kinda good (if it weren't for everybody being super heroes).
That and its color palette doesn't suck.
The game just needed a bunch of hard modes like FEDS and FE3DS have. Any FE game is gonna have the conviction of having to compared to FE7's story and wind up being bashed for it, so FE8 isn't alone here.