Maybe I'm splitting hairs here, but how does the Earth Implement affect anything? I mean, you take the move penalty when you enter a square, right? So... I dunno...
Also, are these implements just, like, infused with the elements?
Also, something that, I suppose, we aren't really thinking about: How are these bonuses going to interact with actual weapon/implement enhancements? Extra damage? Extra forced movement? At what point does it become too much? I mean, I know that "As long as all the players have access, then it's balanced just fine." But, if a critical hit can remove a limb, potentially removing movement or an attack from the Solo Brute, that encounter would sorta become less fun for everybody, right? Doesn't this sorta add in the save-or-die elements from 3.5 that were left out because it'd have one character end an encounter?
Am I looking too much into it? Did I ruin it? I ruined it. Sorry, guys. I ruined it. Hey, mom? I ruined it. I know, I know. Yeah. It's ruined.