[quote=@WrongEndoftheRainbow]
[@Ophidian] there's millions of galaxies out there. they won't look in your direction until suddenly you're kicking their teeth in. the narrative very well could be working up to that point. the UU scouts are basically the "get out of my face" assignment for really bad screw up a, so they'll get ignored.
[/quote]
That's straining suspension of disbelief honestly, to get anywhere near the level of challenging the UU, any civ from this game would need to take galaxies for their material needs, and you've said the UU deals on the level of galaxies-you're telling me they won't notice a power rising like that...well, I don't quite buy it honestly. 

Especially when the powers here have such diverse tech-something tech-leeches would certainly notice spreading and expanding, considering how much their own existence, from your own words, depends on it.

I just think the behavior you're describing, and the attitudes, fit a galaxy-tier extra-galactic power more then they do something on the level you've described.