BYU recruited and invited him to come to the university. He accepted.
If he doesn't qualify or if there are issues with his grades or test scores - that all should've been reviewed long before the invitation was extended. Once he's been invited - he should be accepted.
I get that this whole graduate transfer thing is relatively new and there must be some issues that need to be worked out. But I don't see how it hurts the program to admit this one guy - who was already invited - while they work out the details of how they will make sure a graduated kid qualifies before recruiting and offering him a scholarship.