... but DDO is huge and 16-yo, long-living game, so buying just 10 account spaces per tier is not enough for all the great gear game offers.

What we need is 100, or at least 50 spaces per tier bought, as we are mostly into different TR, so there are bunches of sets we swap, and it is really annoying to have them spread all over Bank of Mules.
With this great named tabs idea for the new bank, an increase of item space number would be the real hit.