When the market view is open, clicking onto "next base" in the top left sets the view to the next base's buildings instead of the previously viewed items category. This was not the case in 2.5.
If I, for instance, want to make sure that every base has exactly 20 incendiary grenades in its storage, I want to have the equipment category continuously open when switching through bases (as it was in 2.5). As it's now, an additional click is needed for every base, and I cannot immediately compare the goods amount. You can imagine how annoying doing it is to do that for lots of item types.
It does remember the category which was open though (primary weapons, secondary weapons and so on).