I don't feel like it was rushed, but I don't find it all that interesting either. I might just be having a hard time caring because it's been so long since Lahabrea was relevant.
Odd pattern, but I only seem to like the raid stories in odd-numbered expansions. I loved Alexander, didn't care for Omega, liked Eden well enough, and so far don't care much for Pandaemonium. Not really relevant, I just thought it was amusing.
Crazy theory time:
Lahabrea will die in the next segment, leaving the Hephaistos soul crystal to become the Lahabrea we all know and loathe in ARR. Would explain why he's the weakest of the three Unsundered (he was never a whole soul to begin with), and why he's so fond of body surfing.