My "not really" brother in law has a Ph.D. in business&computer science. He now wishes to have put more emphasis on the business part as it would help him get a more interesting job at the bank he works for.

Tough choice.

From the belly, I think he should choose what he excels in, not drudge through what he thinks is better for the future... Lots of doors open up with a good grade record, then internships or a first job can be a step up.