massivelyop.com/2017/03/31/the-daily-grind-are-you-excited-about-secret-world-legends-2/
Seems like one of the best sources of current knowledge outside of Beta. The combat seems to be changing more than I first thought. What with the reticle and now the left mouse button for primary weapon and right for secondary. It seems they are wanting control pad support as well, someone mentions in the comments that the steam controller works well.
I figured with the early launch plans there wouldn't really be great changes, looks like there will be after all though. I can't really imagine, like in PVP, that you could be attacking someone but looking behind you (like you often do) with the new system. The same with some boss fights I guess!