Scott beat me to the question of when has Kane ever had a great match -- namely never. Which isn't to knock him (explicitly), but just in response to the statement that "Kane can easily be carried to a great match." I think the fact that he's only ever been carried to two very good matches, the SD match with Kurt and the long Raw match in fall 02 with Jericho, would indicate that it's quite difficult to carry Kane to a great match.
That being said, I do expect Benoit to get a good match out of Kane, and if the finish is Benoit getting him to tap after a massive struggle, that could be pretty nifty. If Eddie could get a match out of Bradshaw, then Benoit, who is a way better carrier and has had many a minor masterpiece with the A-Train, will get it done. However, Eddie got to work with blood blood blood and all the other main event tricks, a luxury Benoit won't have because the blood will be reserved for Hell in a Cell.
I will agree that Kane is not the best worker the company has. I will agree that Kane lacks mobility. But Kane is not a bad worker. I repeat: Kane is NOT a bad worker. He has good psychology, an excellent understanding of his character in and out of the ring, and some of the best damn punches in the company. Kane will be a perfectly serviceable challenger, and the match at Bad Blood will probably be completely fine, if not terribly surprising.
I agree with the last two statements completely. Glen Jacobs can move better than 99% of men his size, and I see nothing wrong with his ability to work a match. The problem is that he's been wrestling squash matches for months.