Talon has 3 bugs that make his kit feel clunky to use and unplayable at times.
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Talon's E has the most major bug. Essentially, sometimes when you jump over a wall (this mainly happens jumping over towers, but it does happen with walls too) Talon does this weird backflip and stays in the same place you started off, only delaying about 0.5 secs when you could be running away from someone, roaming, chasing someone, etc. This has gotten me killed more times than I can count.
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This bug isn't quite as major but can still be a pain and can still lose you kills. When you Q, you're supposed to get an auto reset. On a ranged Q where you leap, this works 99% of the time, and the other 1% is probably just my error. That's fine. But the melee Q is almost a gamble and can lose you kills or get you killed about 50% of the time and it can really piss me off.
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This is another bug on Talon's Q. I don't use quick cast so I see the indicator range on abilities before I use them. When using Talon's Q there is a big circle and a small circle, and if the enemies are out of the small circle, Talon will leap to them which closes the gap. Well sometimes when the enemies are CLEARLY out of the small circle, like several millimeters (that sounds so small but it's pretty significant) out of the circle, Talon will not leap, but extend his blade into the 5th dimension, rather than leaping. This has lost me so many kills it's insane. It wouldn't even be that bad if the cast time didn't make Talon stop moving but it does, so if anything, it makes the gap bigger.
These are the 3 major things I feel are wrong with Talon. Everyone on the subreddit is asking to buff him, but that's not needed. Just make him feel less clunky to play and I'll be happy. 
instead.
, good for splitpushing towers, now he lost that power for a small dash [[ even after rework, he had that AA>Q>AA, but then again Riot decided to remove it so you have to work harder to proc the passive]].