So about Skarner Q
Why didn't his Q receive the proper QOL changes for removing the slow on it? Right now unless you're standing right on top of them, enemies can just walk out of the Q because of its slow animation and low range. Hecarim's Q in comparison deals damage instantaneously around him and has the same range. So perhaps it would be a good idea to increase it's range by maybe 100 units.
Not only that but why does it still have a weak first cast if the slow is gone? Design wise that was the whole reason it couldn't be full power from the start and it still having one seems unnecessary.
Finally why can't he hold his Q stacks longer? Keeping them up without the permaslow is quite harder not to mention since it now has the AS speed steroid it hurts his clearing a little, because you can't really go from one camp to another without setting yourself up for it. Again the reason he couldn't hold it long was to add counterplay due to the permaslow, with that gone he should be able to hold them much longer.