Yeah, I mean, it's not like it sounds bad or doesn't work at all, but the DI out is just not hot enough to drive most power amps to their full output, so what it really boils down to is, is it enough? If you get a beefy enough power amp, it probably would be... if for no other reason than the ability to drive lots more speakers... if you have them.
So again, it "works" and it does sound just fine, but it's a question of if the output levels would be satisfactory.
I will add one "frustrated comment".

The SA-450 is basically the same thing as an LMII, and has an adjustable DI that can be up to 2.5x hotter than the LMII, which would be more than enough, but last I heard, GC has no plans to import that one, so if you get one (such as from Canada), there's no warranty at all.