So I fiddled with 2.5 for a few minutes yesterday, and I think this is going to be an awesome patch. Performance is crap right now, but once they get it running at reasonable speed it'll be great. The lighting pass that they did made a huge difference to the visual quality, at least for me. FPS movement feels much smoother, head-bob is totally gone, ship HUD's are being reworked, and I think the little Argo is going to be a massive hit.
All in all, I love it, and I haven't even been to Grim Hex yet. Just need to do better than 10fps by the next patch, hopefully... Mind you, the overhauled ArcCorp runs incredibly smoothly now.