no shared stash in pre-exp/classic-mode
from what i gathered from all the players who i encountered in pre-expansion, this is a bug or feature that has broken resurrected gameplay features integrated into the game for the remaster.
Everybody expected this feature. Pre-Expansion players need to BUY another copy of the game. and run it in a VM or another computer… and this is what blizzard is trying to prevent. (even though a sorc needs a barb for bo)
A MINIMAL SOLUTION
A single TAB for a shared stash equal to Expansion Stash, leaving classic normal stash untouched will suffice.