I don't think the rules "ruined Mario games", but it's absolutely been a creative negative on spinoffs. Some basics IP guidelines obviously make sense, but the current ones are too restrictive and have hurt the games.
It doesn't mean they're dismantled, that's true. But prior remakes (e.g. M&L SS) weren't grandfathered in and had altered designs, so clearly something has changed. They could be loosing up the rules or granting exceptions to remakes now, impossible to say. Either way it's a different treatment. I just hope SMRPG and TTYD HD are successful and show Nintendo people prefer this approach, they're better games untouched like this. Does anyone really wanna live in a world where Fat Yoshi got a design nerf?
I don't think so.