My only Omega is a P-07 OD that, after a good cleaning, some polishing, and replacing a few springs and the DA roller bushing, is plenty good enough for my expectations of a polymer duty pistol (and certainly better than most other polymer pistols I've shot). But I know they can vary out of the box, and the amount of 'love' they may need as a result can vary accordingly as well.
However, I can't say I have anything to complain about when it comes to the DA on my SP-01 and PCR. And I haven't taken either of them apart to do any polishing at all. I replaced a few springs on each of them, mostly just to lighten things up and that's it, other than shooting the heck out othem. They both have great, smooth DA triggers, and I'm comparing that to several classic Sigs I own, Berettas I've shot, etc. In general, I don't think it's quite as simple as just the "push vs pull" design being the source of the issue, at least not in my experience - it's the Omega design specifically that needs some tweaking.