It makes little, if any, sense.
And all the parts that do make sense are poorly written and horrifically implimented.
I mean, I kinda get the whole "We've used Seefra to seal Tarn Vedra off from the Abyss" thing - but how is it that the Vedrans knew about the Abyss with enough warning to build an entire star system to defeat it? And they'd've basically had to have known pretty much everything about everything to get **** to work.
And how come there were just some Vedran ships hanging around waiting to come back through the slipstream portal?
And what the **** was the Abyss? The whole 'planetary avatars' thing was just plain stupid, but at least that was kind of explained. The Abyss was just some big evil thing with no real purpose or point to it other than to **** with people. Though, I assumed it was the equivelant of the avatar of the vaccuum of space - but even that has it's problems.
The whole thing just wreaks of ****ty writing and half-assery in all aspects of it's production. It's like the stories I used to write when I was 7. A bunch of **** happens, then all of a sudden about 10 plots all crash together and end for no apparent reason, then the main characters stroll off home.
****ing bull****.