I'd say you have a point if I wasn't pretty bad in long spars in general (not because it's gives someone an insane advantage). Some peoples spar style compliments it greatly but that doesn't give an extreme competitive advantage. You turned it off for about 3/9 matches and ya I was able to win easier because I generally like to juke and play reactively instead of proactively, then won 1 with it on. I'd say spar someone who doesn't seem to have much trouble with it, would be more accurate of a measure of how much better someone gets.
Either way, I enjoy sparring anything that forces me to adapt and learn.
Also worth mentioning the server is **** right now and we were warping everywhere