Nice.Ruin the first date on Day 6 - and you'll see no dicks.
Jpg and webp don't differ significantly in terms of compression/quality. Also, I find a way to compress pngs (get Pro onYou must be registered to see the links). So, the game is compressed adequately by now. It's just impossible to compress over 11k images and over 1k animations more without losing quality.
Jpgs do not work with transparency though, and AFAIK, webp is better than jpg, quality wise.
Personally, I never quibble over file size, quality first, after all.