Perhaps the word "abuse" was the wrong word. But it's a sore point to be trapped in mixed lobbies with people who can move in ways that not only are unavailable to many of their enemies, but which also look like cheating, pure and simple. Not saying that tap strafing looks like cheating (in the literal sense), but I've lost to people who bounced around like in a pinball machine, and not even off of anything. Just randomly flying through the air and changing direction on a dime multiple times. Real crouching tiger hidden dragon crap. Ludicrous. If what they were doing is within the bounds of game physics then I'll eat my hat. Or maybe a better way to put it is this: if what they're doing IS within the bounds of game physics then there's something else the dev really messed up.
And the subject of battle legibility has always been a sore point for me in this game ever since Respawn used it as the excuse for an early-days pathfinder tactical nerf. To say that he needs a longer cool down in the interest of battle legibility... in a game where some legends throw smoke, some others can literally disappear, and yet one other (Ash) now has a suite of motion abilities that defy any rational explanation... all of this just gets on my nerves in a big way. Engagements are already hard enough to follow and comprehend in this game. More speed, for anyone in any context, is not what this game needs. Imo.
And don't get me started on AA. I'll go on all night! At any rate I certainly don't see it as a legibility issue, though I'm probably misunderstanding you in some way.