In most of the KEY ways, aside from combat it was a backward step, the main bad guys were no-where near on the level of the collectors or reapers, re-spawning enemies which I don't know WHO thought was a good idea, literally seeing them drop from out of the sky having just blown them away minutes ago....as well as the land buggy being completely useless compared to what you got in Mass Effect 1 and 2...
The dropships were bringing more bad guys that looked just like the ones you just killed, not the same ones you just killed. That dropship mechanic was used by the geth in Mass Effect. The new geth also looked just like the geth you just killed.
The new bad guys were very similar to the collectors in a lot of ways, given the relationship between the collectors and the protheans was very similar to the relationship between the angara and the kett. But there was no reaper-like threat in Andromeda. I'm glad there wasn't, because that would have just made it a clone of the originals.
The thing that set Andromeda apart was that it was about the struggles of the Milky Way species just trying to survive in the new galaxy. They were fighting extinction from lack of habitable worlds as well as an enemy who threatened to kill them. That was the point of the game. There wasn't as much urgency on the world building as there was on the bad new species stuff and I think that's mainly what hurt the game.