Unless they're going to severely break from BT cannon, doing orbital bombardments will probably not happen as a matter of course in the games. In game world, orbital bombardments bascially all but banned by the "Ares Conventions." The game even mentions this in a load screen I believe.

Well I figure that's more the kind of "strategic" bombardment - the kind that would level cities, and more importantly, potentially destroy the few remaining active factories that exist (if a world containing such were bombarded).

I was thinking more like a "precision" attack - basically still an "area attack" but with a radius not greater than the width of a couple of Battlemechs. Which doesn't have to come from orbit, it could come from aircraft in the atmosphere (which I gather is possible, since Leopards are supposed to be able to carry air support units in addition to a lance, right?). Either that or some kind of artillery. LRMs kind of look like they'd be great artillery, but the fact they have no ability to target an area is a bit of a shame.

Actually the story missions feature this kind of bombardment early on (one of Arano's loyalists cops a barrage, flattening a village/town/base of some kind). I can't recall if that was from artillery or airstrikes though (pretty sure it wasn't an "orbital bombardment" as such, but it was definitely more powerful than a couple of mechs firing LRMs at it, from what I gathered).