Blocking pushes you one tile back

[Frank_Stein]

I think either kind of push would mean the person who is blocking has less capability to follow-up on the block by immediately retaliating

but it could be an interesting effect, maybe tie it to certain kinds of weapons to make them more defensive?

Actually yeah. I can see blocking with different items having different effects that either move you, keep you still, make you hard to push, or move your opponent back