Riot a starting point for properly nerfing marksmen as a whole
Nerfing crit chance and buffing attack speed on zeal and zeal items.
Yes this is a request to partly revert a rather drastic change in preseason to several items.
Make Zeal be 15% crit chance and 20% attack speed for 1300 and most will be fine with this change.
Make Rapid fire and Shiv have 5% less crit chance but 5% more attack speed. (no cost change since they will still be considered good and often bought for their ENERGIZED STRIKE passives)
Phantom dancer would be fine as is with 45% attack speed and 30% crit chance. this would return it to being the best crit build option of the three crit zeal ADC items like it was last season. Perhaps make it cost as much as the other 2 crit focused Zeal items.
Last of all return trinity to 30% attack speed reduce the crit chance to 15%. For it supposedly not being an item that is only good on marksmen it sure feels rather meh after the changes with the 15% attack speed. Yes this is part of the reason why rage blade is being bought by Irelia and Jax. Rageblade offeres more damage (when fully stacked) for 1000 less gold and the attack speed is so much more rewarding with the on hit damage in their kits then a chance to do double AD damage.
Mistakes will be made in major balance changes. The problem riot is that you are trying to fix everything around the mistake instead if the initial mistake. It is a lot easier and faster to turn the heat down on the stove then engineer a spacier to suspend the pot the right distance over the burner.
Crit

+ defensive and not the Tank Fiora abomination that is Titanic Hydra Bloodthirster and then straight tank.
has to have 20% then the items it builds into have to have 30, except
&
still build it. I'm sure there are more.