I am terrible at omaha, however, I will provide some BS analysis to bump your post.
The thing is, on the flop, we're 60/40 with all our worse case scenarios, so getting it in isn't a huge mistake, but would be a mistake most of the time I suppose.
And while villain won't be v-betting anything worse, he is giving you 3:1. So you only have to be good 25% of the time. Plus, wouldn't they bet a full house harder? I could imagine some 5678 or something type hands that you can beat, or maybe a borked draw once in a while. I'm sorta a pay-off bitch, tho, so I'd pay it off.