Omaha theory: Folding the nuts on the flop.

[EatMoPie]

Say we're at a .5/1 game PLO
5 people see the flop all with 100$ in front of them.
You hold 5c 6c Ah Qh

Flop: 3s 4s 7d
Pot : 5$

You pot it for 5$ and everyone folds except a very solid TAG who repots it to 30$. Is a fold here +EV?

Against nuts with a flush draw, ev = .30
Against nuts with a straight redraw ev = .39
Against nuts with Strt+F draw ev = .22
Against nuts with set ev = .31
Against nuts with set + F draw ev = .18

etc...

Basically your EV is around .3 against most of the redraw hands which imo is not enough to make a call with the nuts on the flop a +EV play. If you do make the call, you'll have to put in extra money on the turn if a safe card hits or you can fold it if a scare card comes.

I think if the 7c was changed to a 7h instead giving you a backdoor flush draw, a call would be neutral EV.

Are there any other scenarios where you fold the nut straight on the flop given different stack sizes, a larger pot caused by preflop raising, or more players giving action on the flop?