I was actually talking about the writing purely in ME1 there. Both Wrex and Garrus were very well developed, really interesting characters from the word go. You have to go out of your way to talk to them, hunting down all their conversations and side quests to really see the full depth of it, but it was pretty obvious that a lot of care and attention went into characterizing them. The human characters, not so much, and Tali and Liara were both so-so at best, but Wrex and Garrus were definitely top-tier in ME1.

Andromeda doesn't have even a single party member on the same level (though admittedly, about 3/4 through the game, I mostly gave up on going out of my way to talk to anyone that wasn't Vetra, Drax, and Gil, so there might be something I missed in the late-game that would change my take). The closest they came was with Drax, and even then, it was a pretty transparent attempt at Wrex 2.0.