Would be an idea to make 'knock down' not just another kind of 'stun'?
Does Slow have impact on Initiative?
Yes it does, but it will only affect the next turn (if I'm not mistaken)
Well, dubuffs for Initiative could do the trick, they however most probably wont be as accurate as setting someones turn precisely 2 points "to the right", but I guess it should be easier to implement.
My point is to insert a new, instant mechanic, to add more strategic approach and variety to a turn phase.
Here are the benefits that I can see of this new mechanic.
1. It will allow witty characters to have a an edge on the battlefield for added benefits of moving first other than try and instant kill the weakest target.
2. It could add a new mechanic that can bypass the armor/magic armor system