Well, those ideas are at least better than the slop we are being served currently. Sure, there will always be people that CBA to do certain mechs, but we see what happens to the game when it is being designed in that way. And personally, I'd rather CS3 experiment more with gimmicks and try to keep the game fresh than serve us the same dungeon again and again.
And yes, I agree - its not hard to make interesting trash and boss fights. CS3 have literally shown that they can (Criterion), if they are allowed to.