Honestly, I really like it. My biggest problem with it right now is not even the stash, it's just that the placeholder image is all grains, all the time, so I can't tell what items I should look at vs just throw in the stash. The extra click to chuck stuff in stash is a very light payoff for being able to keep adventuring when out, well, adventuring. Knowing I can pick it all up, and then sort through it all when I get home, instead of just standing around in the middle of a dungeon going 'do I need this-wait it weighs a half pound too much' is very refreshing, even if less 'realistic.'
I think once everyone is used to the somewhat smaller normal inventory and stash system, most of us will wonder how we ever made do.