Well made, and with an interesting take, they can be fun. They're also a great way to relieve the inevitable monotony of constant blasting missions. Boil it right down, and FS really only has a very small number of traditional, core mission types - assault, defence, escort (debatable, could be a subset of defence), stealth and... maybe capture? There have been some innovations lately (capship, RTS - TopAce had a cool ferry mission in his latest campaign), and there are environmental variables (Nebula, atmospheric, interior), but most of these are pretty asset heavy and complicated. Not doing the occasional stealth mission is kind of a disservice IMO, especially over longer campaigns.