I bought it recently and just cant get into it. The engine feels old and clunky and the marine weapons seem very hollow.
Yeah, I'm the same.
Absolutely loved NS1, but a lot of NS2 maps feel sprawling and corridors/rooms quite often look very similar. That combined with the dynamic lighting make it too easy to get completely lost. Pub games can be very hit and miss because NS has that inherent flaw where if you get a noob or a dolt in the commander seat it's certain loss.
It's quite playable now, but there's still seems to be a somewhat unfinished quality to it. The good thing is the devs seem to be updating it regularly so I'll give it a go in 6 months maybe to see if it's any better.