This kind of "human at a particular level" play is something I've personally wished for many times. I find playing against programs very frustrating, because as you tweak the controls they tend to go very quickly from obviously brain-damaged to utterly inscrutable. Win by a mile or lose by a mile, don't learn much either way. Sometimes there's a very thin band in between that's the worst of both worlds: generally way above my own level, but every once in a while they'll just throw away a piece in the most obvious possible way. If a human did that I'd interpret it as toying with me, or taunting.

This kind of program seems like it would be much more satisfying to play just for fun, and perhaps (with a bit more analysis support) better still as a coaching tool.