I doubt it would be possible... I mean, would be nice to have a short-cut to load a defined equipment set, but since every un-equip you do gets send to the server, it would be quite a challenge.
PSO2 has something like that, but you can only change while in the lobby
(I know BB doesn't manage inventory in the lobby, just saying that you can not change while on the field over there.)
Well, that's true. The only thing you could have for this (afaik) would be a series of commands (is there a way to add a custom menu?) that would change the thing server side and you would have to reload blocks but that's kinda wonky, you would have to make the server keep track of your sets and ofc invalidate them if you no longer have the items. tbh Is not that hard to press F2.