Well it was fun in Spiral Knight and I enjoy every fights.
But still, something I think may be more fun if you can knock enemies to E Hazards and watch them suffer just like you do.
And for not making it mess with any coding of the game, I think dev can make it that they only get affected when being knocked by your attacks.
Have been wantin' somethin' similar myself, but balancing is a tricky issue for that. Having it only apply when they're knocked in would serve to balance and be nice, but a bit weird and probably confusing for new players.
I'd like to see more things like Lumbers/Trojan slams either way though, that you can lure enemies into and use against them~