Draven buff
Hello.
It's cool to see Draaaaven get something nice, since he wasn't in a very good spot since BT and IE change (you know, the one from start of S4 I think). However, I think that his passive needs more opportunities to use it, rather than being more potent.
The best and healthiest way to do that is to make it proc on assists. Let's say for 20-25% of current stacks, with no base value (so if you get an assist with 200 stacks, you will gain 80-100 additional gold, contrary to the 450 bonus gold you would get for a kill). This way it no longer feels so bad to have the support or jungler take the kill (either by accident or necessity) and you feel better for getting assists.
Or just add 10 base damage to his Q. This way he won't be one of the weakest (if not the weakest) adcs on levels 1-3/5. Hell, currently Kalista just outdamages his axes (that is assuming Draven perfectly juggles with 2 axes at once) with her E (also accounted for her lowered base damage, mind you), until level 5 or a big damage item (BF sword usually).