Roguetech is, in my personal opinion, an incoherent mess of "let's throw everything against the wall and see what sticks" then proceeding to leave what doesn't stick in the latest release. Battletech Extended & Advanced are the best bridges between the reduced scope of the HBS/Paradox original release and the tabletop game, and I say this as someone with a lot of complaints over what the HBS/Paradox game did to stuff like melee, falling, etc. that stripped a lot of the meatyness that makes Battletech, well, Battletech.