So I think I'm fine on the Orbital, then. For the M/M/T build, I'm using it mostly as a foothold to get into more advanced builds. It works fine for what I need it to right now.
I suppose eventually I'll have to learn how to stop rushes. I remember reading somewhere that ramps aren't allowed to be walled off by 2x2 buildings anymore. I'm not particularly savvy, so I'm not entire sure what that means (it means that Ts can't build barracks to wall of ramps anymore?). In addition, is there just one type of rush they go for (which means if I'm playing against a certain player it'll be easy even without scouting to assume that he's going for that rush), or are there multiple types? I know Zerg has more than a few, like roaches and 6-pool.
Well, that was a one-time case. My Zerg ally definitely had a lot of skill; he expanded to my natural and the natural after that by the time I could finish my first attack group with Thors and medivacs. He also went full Mutalisk later in the game (which I assume is a standard Zerg tactic?).