Right then, let me see, while staying spoiler free (though I would like to point out that I wasn't the only one to comment on the fate of Ginn, I just agreed to it).
Blue Aliens.. Why are we making a big deal about them still? The last time that we saw them, was in season one, before Destiny passed between two galaxies, that took three weeks with an 'efficient' FTL drive, something which it was stated more than a few times, was something that the annoying blue guys, had no knowledge of, or equivalent thereof.
Infact the only reason that the blue guys ever caught up with Destiny, is because it keeps stopping, however, 3 weeks at FTL, was too much for them to follow.
It's never been said the blues are slower or faster. They've been following the ship for a while so must be capable of keeping up with it. The reason they couldn't find them while they were stalled was the massive area of space (not the distance) between galaxies. It's like looking for a needle in a haystack. When one took over James (Lt Boobs) and managed to send out a signal, they found the ship quickly enough
Chloe's injury... it stands to logic that something happened while she and eli were trapped in the forward section of the ship... or not.. seems I am wrong after all, reading an interview with Elyse Levesque, she talks at length about becoming a blue alien.. oh well..
Still don't think that the blue aliens can find them though.
If they can follow them across an intergalactic void it seems reasonable to assume they're still around The ship still seems to think they could be a threat (youngs battle scenario) I doubt Chloes storyline would have been put in if they weren't going to reappear at some point