As I said earlier, flooding your wetsuit is a good idea before descending. I took TMHeimer's post as agreeing with that. Effectively emptying your BC is certainly a skill one should develop.
With another 5 lb in the tank at the beginning of the dive plus the 2-3 lb from exhaling... I'll simply state that if I cannot get down without difficulty with all of that going for me, then I do not have enough weight to avoid what I consider to be an excessive final ascent rate at reserve pressure (regardless of wetsuit, BTW). As always, YMMV.