I'm currently working on my second playthrough of Mass Effect 2. In the first, I skipped the N7 and DLC assignments because I wanted to save them for my completionist playthrough (this one). I'm currently planning on doing them after I finish the final mission, however, I want to make sure that I'm not going to end up with any of them locked out or blocked because of changing circumstances after you finish the main story.
If I decide to wait to complete these assignments until after the going through the Omega 4 Relay and beating the final boss, will I still be able to complete them all?