All of this is indeed really cool, but ultimately, not being able to climb is just a bigger nuisance. It's one of those things that didn't bother me as much in most of my first playthrough because, as annoying as it was, I knew that at some point there would be some gear or power-up that would allow me to climb in rain more effectively... but no. If it's raining, it's raining and you just gotta say "oh well".
Well, like I say, ideally the climbing gear or some kind of gloves would've allowed that, but Revali's Gale pretty much does.
You can also climb even when its wet; IIRC (haven't had to use it since getting Revali's Gale in March 2017) you jump after every 3 handholds. You burn through stamina faster but it's not like rain means you have to just give up.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.