obvious stealth nerf to kadala, i spent over 9k shards and didnt get a cindercoat or arkans chest yet, only 3 of that shitty green coloured chest and a couple of other useless chests goldskin or whatever. QQ
I would probably buy boosters like in guildwars2, what i mean by this is a consumable you use to give a buff to magic find, xp, gold find etc. for one hour. I wouldn't wouldn't spend my money on cosmetic stuff like the op mentioned, voice packs and skins and such don't interest me.
More stash space would be acceptable as well, but personally i wouldn't buy character slots, one of each class on sc/hc is enough for me.