I just got my M208 TMA05 paper back, and it bucked the downward trend with a mighty 80%. A quick look at the assignment calculator and I reckon I now have enough OCAS marks to keep me in the safety zone without doing the final two TMA's at all. Granted, I'm going to be settling for a lowish overall mark, but I actually think I have more OCAS marks than I'm going to get for the OES part anyway.
I think it would actually take the pressure off a bit if I forgot about the TMA's and just concentrated on revision.
I might just fire off an email to my tutor to that effect.