ME1 alone had "on screen" humans, turians, geth, volus, elcors, hanars, asari, salarians, quarians, keepers, batarians, reaper(s), rachni, and thorian(s). Plus many non-sapient races like thrasher maws, gas bags, husks (of different origin, though this is controversial), pod crabs, pyjaks, space cows, varrens, etc. MEA was in development for 5 years, and combat system was being significantly changed with each successive ME game.
I do understand that resources need to be evaluated and carefully used, but having like 2 new on-screen races (angara and ketts), both bipedal humanoids; while NOT re-introducing geths, volus, elcors, hanars, quarians (I know, perhaps in DLC), keepers, batarians, reapers, rachni, and thorian... Well, let's be serious, it does not bode well. OK, so let's accept *for a moment* that we are in a small cluster, and it is not cosmopolitan or safe enough to be a magnet for too many Andromeda races. But seriously, we *have lost* races like volus, elcors, hanars, quarians, and batarians, with NO REASON at all not to re-introduce them. Andromeda Initiative had planned all its logistics without volus? Arks and Nexus with no single quarian to be drawn to help with ships? No hanar missionaries? No batarian refugees? Seriously, even all the asari looking ALMOST THE SAME? This is SOOOO sloppy... :-(
It is as if in Dragon Age Inquisition You had only humans, dwarves, and darkswpawn, and then You were suggesting that excluding elves ("to be added in DLC"), quanari, demons, undead, spirits, golems, and werewolfves was OK because Devs used a new engine for the first time... But wait, actually I am quite sure that not only Devs had not excluded any races from DAI, but even added some new varieties, right?