We've both heard these arguments before. I doubt either of us will be convincing the other. The main point I wanted to make initially was that Talon's nerfs fit Riot's general MO for nerfing. The reasons why he was nerfed aren't very unclear I think. Riot is trying to phase out assassins that can assassinate while their target can't react outside of the most generalized counterplays (build tanky, pray for teammates to save you instantly, etc). He got strong because everyone else got nerfed, which gave them the opportunity to do what they wanted. It's pretty standard fare I think. There may be disagreement on the necessity of it, but the pattern is nothing new.
You're right about not convincing me of course, I just can't see how a skill that can be countered by buying a single item or increasing a single stat is uncounterable. It may be riot's perception that they must remove all silences from assassin's, but that is no excuse to gut a champion, because of it.
For instance: lets say riot decides that reset mechanics are too op, and should be removed from all assassins (assassins because well know who gets nerfed in this game). So, they start off by removing akali's reset charges on her ult, thats fine, because i mean she still does incredible damage, and has 3 ult charges, which is more than enough. Then they take kha-zix's reset on his jump, but they justify it with the fact that he has invisibility and a slow for disengage. Next is tristana and her jump cd, but its also okay, because shes an adc and has probably the longest range in the game with a huge escape/gapcloser.
Finally, its katarina's turn, so they remove her passive, and decide she now gets a little move speed buff for 0.5 secs every time she auto attacks a champion as a new passive. Without her passive katarina would be trash, and so they give her a buff that is already in her kit (w) to compensate and just leave her as is. Now, try to imagine how mad katarina mains would be if this were to happen. Well, this is how anyone who mains talon feels atm. "They trashed my favorite champ, but its ok because some nubs were qqing about it for awhile. I'll just accept it, and move on" Yah, right....
Anyways, what I'm trying to say is look at it from the other person's perspective, not only was talon nerfed despite his abysmal pick rate, but his compensation was literally a re-hashing of one of his abilities. Why would this not piss anyone off?? And meanwhile we have so many other champs that are solo que stompers, but they are being ignored.
I don't know i just guess that the nerf was lazy, and unjustified, and it gets on my nerves when anyone comes on here saying that it was fine without looking at both sides of the issue. Anyways, that analogy was just my 2 cents on why what riot is doing to balance thematically doesn't make any sense.