Yeah, listen, Aziraphale has considered this and he doesn't like it either, but at the very least, not having Crowley's help also means not having to make sure Crowley doesn't do something extremely stupid.

It's not ideal, but it's a singular bright side.

"No, definitely not. I'll let you know if I start worrying about that," he says. In case, uh, he starts losing enough energy to keep a human form or something...

No need to tell that to the Soldier.