I only saw the Kofi/Shelton opener the other night, but from what I remember, Adamle did not seem that bad. I don't remember one screw-up, and he seemed like he was starting to get the hang of things. Not saying "Jamaican me crazy!" alone was a good start for him.
I still don't agree with them passing Josh Matthews over for Adamle. Matthews has done a lot of good work on the b-shows, and as someone who's been in the company for a while now (Tough Enough 1), he really deserves a spot on a major show. Adamle is much better suited in the role he had on Raw... I think in time, he could have grown into a poor man's Okerlund. Plus, as much as he had screwed up in the past, I'm sure he could read off a teleprompter just fine... he is a sports anchor in Chicago.
I do think Adamle has definitely gotten judged a bit too harshly so far. He seems like a nice guy, and it seems he was thrown into the situation he currently has. If they were planning this, they should have done at least a little prep work with him at WWE Headquarters. However, Adamle is also at fault as well. If you're getting paid $300,000, at least learn the names of the wrestlers. I think in time, he'll be just fine.