As with Vic and Chef, I have not had any trouble getting both good stage, and room sound from my Walkabout 12. I've been using mine in several combinations for the past year and am happy as can be.
I did have to play the EQ game for about a week or so to get where I wanted to be tonewise, but after that, it's been all goodness. In my case, the EQ change I made that was most effective was to slightly cut the lows (say 11:00 at around 100-200 hz) to balance out the stage/room sound. I found the Walkabout to pretty amazingly thick, almost too thick, at a "flat" setting with all knobs at 12:00. I think this has to do with the passive radiator, but I am no tech.
I have been using the Walkabout with a mesa Powerhouse 1x12 for extra push. By just playing with the crossovers and horn levels in each cab I have found great tone (at least to my ears and my band mates). I also have an Aggie GS112NT and it gives the Walkabout another voice all together. The Aggie low-mid punch and the Mesa full range tone matches up extremely nicely.
I have also used the Walkabout head (out of the combo) to drive the Powerhouse 1x12 and the Aggie GS112 as a 2 1x12 stack. This combination has provided the least amount of success getting a tone I like. But I'll keep trying, cause I think its doable.
As an additional data point compare; I have a Mesa all tube Simul-state 2:90 power amp laying around the house. I recently set it up to take the FX line out from the Walkabout combo into both channels and then drove the Powerhouse and Aggie 1x12's off each channel. Talk about a great tone !

wow.. thick, w i d e ... crisp, all tubey thing that just sang to my ears.
I recognize that this set-up is not particularly gig practical and I am seriously underpowering the 2 1x12's by only running 90w into each, but this set up produces such a sweet wide tone that I wish I could find a practical integrated setup that could deliver the same quality of sound. Head or rack/modular .. that would be very cool. Anyone have any ideas about this ?