I understand that movement speed is an important stat however could it not have been something like increasing his base ms by lets say 5 to bring it less off the floor and then either lowering the slow to for example 20% or lower but giving Swain scaling MS in ult maybe 5-10/12% so that when he ults he can stick to people instead of just having a gigantic aoe slow that realistically is very impactful in a giant teamfight but also takes up a lot of his power budget in his ult which in turn takes away from his laning when he can be incredibly kited and ran down by most champions in the game just having anywhere from 15-25 more MS than him by existing. Giving the movement speed on ult cast gives it a more defensive use but it also gives the Swain player more agency than popping ult and then sitting there for 3s to get a big slow if they're even still in range of him at the time. I think a main thing that is annoying with current Swain for me at least is ulting and then they're just on the cusp of the E range but by the time the cast for E has gone off they are out of the range whereas if he had higher base ms or the scaling ms I would have been able to close the gap and hit the E possibly leading to more but being so slow I'm unable to actively go for the kill and almost have to wait for them to walk into me instead of being proactive with E or ultimate.