I don't have an issue with adding avians, but I have these requests:
1) Do more changes than that. We've played with age 42 rules before, it just isn't interesting to repeat a round. I'm confident you can do small number tweaks code-wise, and you can have a public feedback session about it beforehand. With the massive downtime we're about to face, you need popularity points and some minor number tweaks would be an easy/safe way to do so.
2) Don't simply restore avian to how it was at some point, think outside the box.
3) Don't duplicate bonuses, +1 def spec and 6/4 elites exist already.