That isn't a bad lineup, especially If KJ does not "arrive" or is not defending well enough AND MR is ready for prime time . The advantage of this lineup is that it puts three shooters outside, and possibly a fourth if you count Lydon, surrounding a big in the middle. Let's see ... didn't we see this work out pretty well recently? hmmm?
At any rate, Lydon has good size and would be a nice bookend on the other side of the rim from DC2 -- assuming he's a good enough rebounder to play the 4 on defense.
However, as much as I like more size at the 4 (I've been b*tching about it since CM went down last year), obviously this lineup has Roberson on the bench. Did you envision him backing up Lydon or trading minutes with Mike G at the 3?
Either way, we won't see this kind of experiment for at least 2, possibly 3, months .. as Lydon learns the zone and gets his sea legs. But interesting idea.