Compare Johnson and McKay to other teams second and third imports if you want to be fair. There's not much difference.
1) The difference, is that unlike the other major contenders, Perth didn't go out and get Aussie (or NZ) Marquees. In fact the one they had, they let go.
Sydney signed so many they barely need to bother with imports.
So sure, I'd take McKay & JJ over say Devin Williams & Moore, But if MU didn't have Goudling and Andersen they probably would have gone for better imports.
2) Also, what we're mostly saying, is that our guys, especially JJ are good, but not a good fit.
Had we say lost Prather to the NBA, but kept Beal, I'd be stoked to have JJ starting at SF. If we'd kept Jawai, and signed McKay to replace Jervis, I'd be like a pig in shit. Frankly even if we had a half-decent local SG or combo to start in the 2, we'd be doing a lot better.
3) Lastly, so what if our 3rd import is better than somebody else's???
Are you saying that means there are no better American players available???
Nick Marvin made the publicly stated choice to go after imports rather than Australians, because they were easier and cheaper.