*opens mouth...*

>It stops being about the stated premise completely after a while. Instead it's just The Adventures Of Gigantic Space Gym Bros.

*closes mouth and nods unhappily*

You have identified precisely why I stopped reading.

(The actual specific point was a bit further on, when it started looking like they were setting up Earth to get taken out - but that's okay, because everyone who's cool and worth saving is on other planets now, so who cares right?)