Originally Posted by Quintessence
The problem with AD TF is his complete lack of a steroid, without one he won't be viable. ashe has other things like her arrow and 600 range going for her which allows her to still be an effective AD carry.
And TF has a 5/6 second CD stun, "infinite" mana (poking with Q early game can really add up), the ability to teleport across the map on a whim, as well as display enemy locations (which is pretty damn huge). And I don't even want to think about how brutal ganks from him would be...
Giving TF a strong steroid is the wrong way to go. His damage needs to be gated over time. It's the same reason AP TF has relatively weak AP ratios + base damages for a mage