Just thinking, we don't really have any rules for Dropship's using bombs on gound targets, or for high altitude bombing (also known as indiscriminate city bombing).
Small, fast Aerospace Dropships would make ideal bomers for strategic bombing (including nukes), their flexibility and range would allow you to jump in a group of these to a Pirate Point, jump out with the initial jumpship. Hit the target(s) with the Squadron of Bombers, accelerate towards the pickup point (using a different jumpship), and jump out (at a different pickup point than the dropoff point).
It's hard to intercept, it's a more strategic rather than tactical move, and fit's in with the whole shift towards PW Dropships rather than Warships.
Other interesting things might be to drop off stealth microsattelites in orbit, (They're boobytrapped btw) Come back in a set time, laseradio the password and download intelligence on the planet, orbital movements (eg a few sattlelites might track dropshiips in and out movements, giving you some information on troop movements, you can tell if a dropship is loaded by it's engine output/performance.
Others might be intersted in crops, yes I said crops. knowing how planets are doing in terms of food will give you information on who to hit and where to disrupt, or how region economies are going. Planetary fuel information (eg blow the hell out of some an oil drilling platforms may completely disrupt almost all civilian and most military vehicles, as well as ruining ecologies) (Yeah it's not nice, but this is Interstellar Grand Warfare we're talking about).
The intelligence bureaus in every nation must be absolutely enormous, and it's likely there are some specific or modified vehicles in many shapes and forms that they use.
We rarely get in depth on the intelligence that drives warfare, but I think it would be an interesting addition. We've got enough tactical units (fighters, transport dropships, etc) There needs to be more background. Why are we invading this planet other than it's got a mech factory?
Stealth for spacecraft that makes them harder to detect (eg higher fuel using that reduces the overall energy output), more strategic rather than tactical uses for spacecraft...