Ho boy. The Land Raider thing when though. I have two reaction. One, I am extremely happy, since we get to convert stuff. The second one is utter fury and hate with every fiber of my body because Primaris can't use Land Raiders.
Nevertheless, let's discuss fun and competitive stuff. It really looks like every weapon is fair game. They even mentioned Helfrost for SW.
Personally, I am not sure which one to take, but I am looking at Chronus for UM. Seeing as the Repulsor does a better job at clearing chaff, probably Plasmas and Las. But if you don't run the Repulsor, you probably want Twin AC at the front, Hurricanes and HB sponsons at the side, maybe even a SB at the top. This will mow down any infantry unit there is Oo
Alright, your turn