I do love the full carving, they make me want to touch them for softness. Those are lovely Bluey, they could come live here ANYTIME.
I heard the full carving lets you get a better grip on the saddle, friction hold, for riding and staying in place. I know I prefer SITTING on a fully carved saddle more than the plain ones. That bit about heat dispersal with carving is interesting, not something I ever heard before. I do think carving-stamping takes daily wear much better than the plain leather does, not worn thru as fast.
I always put the partially carved saddles down as “lesser” because they didn’t get the extra time spent on them. Cheap saddles were plain, not carved when I was a kid, learning about saddles. Like any horse thing, you look over a person’s “outfit”, saddle, bridle, horse, boots and clothes, when you meet them. Plain new saddle meant they didn’t spend a lot on it, usually one of the local Horse Auction specials. Though seeing an old, well broke-in saddle all shined up, meant it could be inherited, of good quality, riding what they had already.
Stamped over-all, or carved on all parts, would be a better look to me, than smooth fenders or seat leather over the fender tops. Too slippery when plain, especially if rainy or you are sweaty and someone drops their head!
A couple designs I have liked were Sunflower and Morning Glory. Both were pretty, recognizable for those flowers in the carvings.
Funny, I didn’t think I was such a saddle snob until I wrote it out!