Kayn is awkward to play, are there plans to make him feel more fluid?

I'm finding that Kayn's mechanics feel clunky and slow, while his design makes him seem like he should be anything but.

His Q feels too slow, especially in the later game. It's understandable at early levels, but at higher levels when everyone is moving fast, it takes too long to complete the dash. There are a lot of cases where I'm better off just auto attacking, rather than a Q, because the Q dash is too slow and animation locks me for too long. It would be nice if the dash scaled with his movement speed or rank, similar to Yasuo.

His E has major pathfinding issues, and it's not clear how far into the wall you need to go for the heal. There are a lot of scenarios where you're visually in an area that other champions can't move over, but not far enough in to get the heal. There are also a lot of pathing issues when you're trying to exit a wall near an enemy champion; I recently had one case where I was trying to exit the wall by top side's blue golem, but the enemy Sion was there and the pathing basically refused to let me exit on that side, regardless of where I clicked to try to go around him.

His R is just plain weird. I've had a few cases where I've actually died as I infested someone, meaning it went on cooldown, but I still took damage from a targeted ability or skill shot. This doesn't really make sense at all; it's like there's a delay on it, though there's no animation or visible indicator to imply that.