Omaha is all about getting or drawing to the nuts.
#1-4 of a kind. What do you need to improve your pair? 4 to the flush, 4 to the straight, 3 of a kind in the community cards for a full house. I don't like those odds
of improving much.
#2-4 suited cards. You are in ok shape if they are connecting or maybe on gap (789j) but unless they are high you will be looking at the bottom end of a straight. You flush chances have dropped from 9 cards to 7. That is what you are really looking for in most cases. You can still play this hand but your odds of drawing to your flush are down by 2 cards.