Allow me to speculate for a moment.

If we start to add maindeck discard (and I'm not talking about hymns, which I don't like, but thoughtseize -- it's better than duress because of spellstutter sprite, by the way), then the deck is starting to become a turn 3 deck instead of a turn 2 deck. Then, how about trying out Lim-Dûl's Vault again for increased consistency? First turn thoughtseize, second turn vault, third turn reanimate what you want with protection isn't so bad. We gain the ability to play more 1-ofs and stronger sideboard plans. We could also try some number of lotus petals to alleviate that the first turn isn't for binning a guy. Something like this, maybe:

4 thoughtseize
4 fow
4 mm

4 entomb
4 study

4 brainstorm
3 vault

3 jin
1 iona
1 sphinx
1 archon

4 reanimate
3 exhume
1 animate dead
1 show and tell

18 land (i'm tempted to try out -1 land, -1 brainstorm, +2 lotus petal here).

Maybe a fourth vault, but you really don't want to see multiples.

The sideboard could contain some of the usual stuff, but really only 1 of most things. Also you could have a couple exhume/animate dead, a couple hapless researchers and a couple dazes, along with the additional creatures, if you want to board into the classic version against the decks where it's good enough, as there's certainly room.

Not sure I'll test with the vaults, probably I'll go for just some thoughtseizes instead of a brainstorm and a daze, but I thought it's an interesting possibility.