I seem to recall this event from somewhere...
Overall, the event wasn't too great - it was mainly just an s2k event except the Combine side didn't stand the semblance of a chance given we were CPs with MP7s against basically double our number - including freed vorts (I'll talk about them more in a second). Now, I am in support of making things easier for rebel players in service of a fun event but it was a little mishandled here.
This event has also revealed to me that the vort changes make them officially OP at this point, at least from my personal experience. There's historically been a lot of debate about whether vortigaunts are overpowered or not - and for good reason, they were quite strong at the time and on a winning streak - though they definitely had weaknesses to be exploited, and part of the reason for their success was that they were quite co-ordinated and good at using their kit to it's maximum effectiveness.
Now vortigaunts have been buffed. Not only do they have a stunlock melee that comes with a shield (See Tuki's video) but they also receive armour damage in place of HP damage - which gives them significantly more effective HP than OTA, especially against non-pulse weapons. I'm still not entirely sure how this works - my only experience of the vortigaunt buff has been this event and the one yesterday, however it feels evident to me that they are currently way stronger than they should be and quite desperately need a nerf. (Sorry vortigaunt players, I'm an evil Combinite now...)
I hear there was meant to be a lot less S2K and the event was meant to focus a lot more on the prisoners and the CPs, which is why CPs were so limited in gear at the beginning, however this did not pan out - and the event ended up being a standard S2K event. As a CP, there wasn't any roleplay after my first death, though the RP I had before it was fairly enjoyable. The command units were getting drunk and there was NO radio cohesion, which was pretty fun. It seems we were sent there as the bad batch, which was a fun RP dynamic. This dynamic even withheld a bit of S2K, however, it did not withold our character's deaths.
The S2K was standard. Not really anything to say about it - it was about the equivalent to a dev server S2K test. To be fair, pretty much all S2K events are like this, and I'm sure it felt more special to the rebels who were playing actual characters.