Hmm. Notes
I have finished LM0, and am currently playing Operation Saviour.
LM0: In a few missions, it is possible to give commands to the capital ships. Although this opens up some more tactical possibilities, it is rather weird, since you probably do not outrank those officers. It also makes fine tuning commands more difficult, as you have to press page down a lot.
Also, I finished, i think the first mission, or possibly the second, with zero kills and without destroying any turrets or subsystems, whilst playing on Normal difficulty.
Operation Saviour: In the third mission (the one where you destroy the jammer), you can carry the GTM Infyrno. The GTM Infyrno is a neat weapon, which can destroy the science cruiser in three hits (it does 40% damage per missile hit), and down several of the already damaged cruisers in two (so basically one salvo). Since a herc 2 can carry eight of the blighters (per slot), you can basically win this mission almost entirely by yourself, which makes this mission very easy compared to the rest of the campaign.