I believe the original reason people used WSE2 was due to the steam version stuttering sometimes, that in combination of the faster load-up speeds.
I don't think to the average user WSE2 is at all beneficial, especially considering its running numerous scripts which in my opinion would only be detrimental when playing and could cause issues in themselves. If you have a PC that's newer than 2011 and can run the game at 240fps, then WSE2 is a placebo where you believe it's actually giving you benefits because some top player said so.