It is a problem imo, zeta mat challenge in 26 attempts so far I've received 1 omega, ability mat challenges, I'm lucky to get 2 a week from there, gw, I can't remember the last time I got 1 from there, cantina level 8 nodes, over 1k energy spent, every node beat, not 1 single omega. I have a feeling if I didn't get 1 every day from the dailies I'd still be saving omegas for my first zeta.
I've been playing since around oct of last year and I know this is a game of focusing where to put your resources but thanks to the horrible omega drop rates I still have characters that need 2+ abilities omegad on my arena team.
And I'll have to agree with scuba, raising their drop rate on stage 8 would help a lot. It's a 16 energy node so it's not like it would be game breaking to up the rate.