Old Talon player here.
And by old, I mean I would still play him if it didn't lead to an all AD team 90% of the time in my ELO.
A while ago, when Ashe was being reworked they suggested that Talon gets her old passive...What if they did that and added a silence? Lol jk. Too op I think.
But honestly, Talon's combo is somewhat weird in E->(AA)Q->Tiamat->W or R->W or R(->Tiamat if you didn't cast it before.)
His W is strong, but somewhat awkward unless you cast it either first or as a finisher/after his ult. Managing to cast it first means they get the long duration of the slow which means Talon's current passive comes into play if you attack in that time-frame of +10% AA damage...But Talon's not really an auto-attack-fighter. He's an assassin. You'll get 2-5 empowered autos at a decent AS (or with Youmou's) if you instantly attack when the W hits and you've casted your burst already. The only way he AA fights is when you preferably have Youmou's and/or still need to finish off the target by some rhyme or reason...But an assassin that goes completely all-in with no real escape outside of Flash shouldn't really have to auto. (Hi Zed, Ahri.....)
He'd also be a kind of solution to the constantly spammed Ahri and whoever else is an AP fotm (Annie after LW?).
I'm a bit off-topic right now, but
tl;dr I'd rather him get a better passive than his old silence back/a channel interrupt. Or both considering he's an extreme all-in champ and somewhat fore-seen by a Vision Ward if he ults. One of the fastest he can kill someone is 0.23s, similar to Rengar in that sense (0.04s)...But similar to Rengar, after that, you can just str8 kill him if he doesn't have an exit plan.