I would say an almost, not quite annoying. For a long time Raiders fanatic, it could almost be insulting, but when you take a braoder cinematic view, it seemed to work.
We zoom in on Indy telling how good Marcus is, how great his skills are. To lend Indy a sense of doom, the best way to do that is to flash to Marcus, lost in Iskenderun. But once you do that, you can never go back and make him never bumble again.
Sallah, to me, was quite similar in both films, but this time he was assigned to protect Marcus. It had to fall apart. Remember the scene in Raiders when he hugged Indy goodbye, and Indy supresses a yelp of pain? Or how about when they open the well of souls? A flash of lightning on the statue scares Sallah. And of course: "asps. Very dangerous. You go first."
Meh. Who's to say, what's done is done.