Yeah, when the item limit kicks in... again... I won't be able to do anything.
I am in the process of building my next mythical, so I have a bunch of epics on hand, and a few legendaries for upgrade purposes...
I have been asking about this since 2 weeks ago, and since no news have been released, (including with the new update...) I am not hopeful.
It is not fun opening one box at a time, and upgrading one item at a time... It is much more fun mass acquiring item boxes, and fusing them all in the mech part.