Here, this is the only thing that has been said about talon by anyone associated with riot since October (at least that I am aware of):
You gonna give talon some form of cc (a real cc, not a shitty quarter second slow) on his cut-throat (e) or maybe a decent form of utility so he can keep up with all the incredibly good kits other assassins have? Maybe give him a real passive? Or a skin?
-me
I think in the future we will shy away from hard CC on Talon because as we have seen in the past, the combination of hard CC and his burst damage led to very frustrating and non interactive situations where he can 100-0 an enemy while they are unable to react.
On the topic of how we would want to improve talon (no immediate plans yet just talking about direction), his current pattern of burst an enemy or be useless is pretty binary and honestly a bit boring. I would want to buff up some of his utility tools like his stealth or even give him new utility tools that are not hard CC (like dodge, spell shield or something like that) to allow him to not feel useless when he can't immediately burst kill his enemies.
-RiotScruffy
So, nothing really going on. They haven't done anything in the past 4 months and don't really have anything planned yet. I think working on talon would probably be a higher priority if more people played him, but that just isn't the case. I'm posting this, because sadly this is probably all you're gonna get. They never really respond to these kinds of threads. D: