The only ongoing complaint about the Walkabout head was the power limitations .. 300 Watts sometimes just couldn’t keep up with high volume level situations.
I have never found a situation in which a 300 W amp was unable to keep up with a loud band. The problem is usually less the amp's output and more the ability of the cabs to use it.
The Walkabout Scout cab is not, in my opinion and experience, designed to be very loud. My original intent was actually to buy two of them, and use both for louder gigs, one for quieter gigs, but that never happened. One Scout 12 is just fine with half-decent PA support, anyway.