A good fleet will ensure a steady supply of zetas and the use case for zetas aren't nearly as taxing as omegas.
In my view, omega bottlenecks are the real killer. Even though we get the recurring omega events, it's very hard to feel like I am able to really make progress because ... I still need a ton of omegas to zeta a toon, in addition to the fact I need omegas to max out so many character abilities. Daily challenges only provide 7 omegas a week, which is basically allowing us to max out 3 abilities roughly every 2 weeks + 1 day (not counting the omega challenges or lucky drops from the ability mats challenges). While this isn't so bad for people with a smaller roster, for people who have huge rosters ... it leaves a lot of untapped opportunity.
For instance even though I zeta'd Finn, I still have a lot of omega mats I need to max out RT, Poe, Rey, RP for my resistance squad. I still have Gar Saxon sitting on the sidelines waiting for his mats .. etc.