I'm still waiting for the day a crap player with "bird" rights gets a one year, max deal to be used as an asset come the trade deadline... 
"Base Year Compensation" makes it hard to do that, if it's a scrub you're giving a big raise.
If it's a scrub who is already coming off of a huge salary, then it's not as much of a problem. You already saw deals like this happening with last year's Jason Kidd deal, when I think Keith Van Horn was given a nice chunk of change for nothing.