I feel like im good when it comes to roaming. I do beleive that talon may be in a SLIGHTLY weak state for the only reason is that i feel his q, w, and r dont provide near enough damage for not having any damage from his e. All other assassins with the exception from a few, (those being ekko and akali) have all 4 abilities that are meant to do damage, and most of the 4 do A LOT of damage.
I feel like talons q is pretty ok, i would like some sort of passive on his e for the reason of a pure mobility move that the only bonus is less cooldown over the walls just feels like they were making it as weak as possible, or maybe they would increase the range of the jump by like 50units just ANYTHING more.
Also his w and r feel really weak in terms of damage right now. The only damage in his kit i feel really relies on you getting his p off.
TLDR: his kit lost a lot of damage for more mobility so it feels like he is slightly behind the other assassins