I forget who came up with it, but I saw a good idea about adding capturable LZs that, once taken, are available for marines to use. It'd be helpful for marine mobility but also add more to consider tactically. Not sure how the capture and loss of the LZ would work, maybe via fixing multiple generators to capture and breaking them to lose it. They'd probably have to function more like ACPs at Tcoms so xenos are able to cut off an LZ.
Would you risk sending a squad to secure an LZ so you can deploy all squads for territorial advantage? Maybe you'd lose the squad and be deploying at a disadvantage. So many options~ I feel like we have a few mechanics already in place that could be used to solve mobility problems on this map.