In reply to kevin stephens:
My guess would be something along those lines too. Bit of a catch-22 situation maybe - they focus their attention more on the routes because the bouldering isn't something that brings the customers in, and vice versa.
But Paul is right, it isn't awful it just isn't great. One way or another the other Sheffield walls set a very high bar for the quality of their bouldering. (Especially the Works, but the drive across town would most likely be a pain in the arse for the OP after work on a weekday.)
As it is, I think AW would be well worth a visit if the OP has a climbing partner lined up, but rather less so as a billy-no-mates.