Ok, nealy 24h gone by. Buy all is a great improvement. It has to change our habits, now you update your girls in Harem, so what? With the new filters (and that they are saved) nearly ok.
Opem Harem, you choose girls by filters that are nearly the same as in market, then you go to the right side and update. The new window for girls levelling opens, you update (OK the max out may be use more items than necessary?), the you close the update window with the red cross top right, and you're back in harem to choose next girl. The harem now seems much faster, so there is not a lot time loss. Remember that in Market window you always had the pop up for contest points , that blocked you to go right to the next girl (at least me). In new window it is below the leaving cross 😉
Reading out some posts and also my opinion: The "team button" and maybe the blessed/unblessed sorting should be added.