Disspelling the "Weakness" Myth
Every time there's a change on the PBE, predominantly in the preseason, there's usually this complaint:
"<name> feels too weak. Don't go through with the rework."
Most recently, it's being levied at Talon. As I am frankly sick of seeing this argument, I'll just address the problem for Riot:
#THEY KNOW
Before you start writing your angry posts and downvotes, champions in a weak state like this are often purposefully weaker. You often see it when it comes to new mechanics, new features and otherwise. The reason why champions are set in these weak states is because nobody, not even Riot, knows the full extent of their potential. Potential you CANNOT see regardless of how many hours you put on the PBE smashing bronze players. In the Talon example, there's never been an assassin with roaming capability like his. Not even Evelynn walking around wards. Talon's wall-hopping is something we've never seen done in League to the extent that it's done.
As an example, let's say Riot listens to PBE feedback and drastically buffs Talon. When he's released and good players actually start learning him, Talon is now a one-shot monster who makes life dreadful for everyone and takes a ban away from you. Valuable data is ground to a halt because of how few people are playing him. Moreover, it skews the info because a strong champion will shine in both a newbie and a pros hands while a weaker champion will tend to only shine in a pro's hands. What's there to gain if the distinction between good and bad isn't clear?
It's also easier to buff something up to a strong state than it is to nerf something into an OK state. Buffs can be easily aimed at any number of abilities so that they are improved in some fashion, from statistic changes to adding a new mechanic. Nerfs are more focused around reducing already existing power (Occasionally something that shouldn't stay but does anyways) or trying to figure out which spell/ability/combo is the culprit of high win rates.
For a final note, please don't go into reworks expecting your champion to be good at everything. Generalist champions have been a problem in league for ages and you can regularly see it in design criticism when it comes to League's designs. Some champions will be better at teamfights. Some champions will be worse. Don't look at a video and go "Talon didn't teamfight anyone Riot isn't addressing his teamfighting at all." I reiterate:
#THEY KNOW
Accept a fault or a weakness your champ may have. Accept that he/she might be weak as people learn to play them outside of the admittedly terrible PBE environment, etc. Just stop holding up PBE games and champion mastery points telling us how these changes "CANNOT" go through. God forbid we have another Garen situation.
(PS: A mage's weakness is often short range, low mobility and requiring more items. It's not true for everyone but don't give me an example like Viktor when you try to argue against what I've said.)

and a bunch of mages