Ultrarange RW 1.0 vs 2.0 breathability?

My Ultrarange RW 1.0 are fast wearing out and the reason I bought them is that they were so unbelievably breathable with all that virtually-transparent mesh on the front and sides, so I'm curious if the 2.0 continues that trend or have they lost some of that airiness? It's hard to tell from the limited reviews and product photos.

Also curious about sizing -- I've seen suggestions that 2.0 runs larger than 1.0 so I'm wondering if I should size down a half size? With the 1.0 I went up a half size from my usual running shoe size.