I'm with you, true.
My personal way of dealing with it is to talk out my issues and that doesn't ruin it for me. That's how I come to terms. Well that and I admit I drank 3/4 of a bottle of wine getting through the Finale. More than I would normally, but I've found it helpful to get through Survivor Finales and I knew LOST would be requiring a dumbing down of my critical faculties.
I truly enjoyed the Finale action until the departure limbo lounge scene, but I was disappointed in the way Smocke went out. Very low key. And everyone thought Desmond was a failsafe, and he wasn't exactly very much at all, in fact what he did had to be undid.
(I understand it made Smocke mortal so he could be killed, but still.)
Speaking of Flocke / Smocke /UnLocke - he never had a real body of John Locke. It was made reasonably clear that his body was an apparition when we saw the real John Locke corpse. MIB whined about losing his body. Christian flitted around like an apparition. Bullets go through him like he's made of air.
Then suddenly, they give us the scene where he feels the earth under his feet. That makes us think of him as solid. He can slit throats -- so he can wield a knife. He eats.
Point being, there was no body there to become mortal. If unplugging makes the smoke monster inoperable, what is left? Why is there something that Kate can kill by putting a bullet in the right place; he was never flesh and blood, and I'm pretty sure that bullets work by making people bleed to death.
Oh wait, true, could you pass the duct tape?