There's no denying Leafs would look better with the addition of a top 4 RHD, but I can't see how they manage that with the roster players they currently have. To me losing Gardner to get that top 4 RHD could make sense given their LHD depth and Dermott potentially moving into the top 4. That being said, even if they don't, I already think Leafs are going to be a very tough team to beat in a best of 7 series. Their defence is going to almost automatically improve as a result of the forward depth they now boast including increased roles for guys like Kappy and Johnson (better 2 way players then the Bozak/JVRs). The Leafs, in theory anyway, should possess the puck so often that their defence automatically will have to deal with less then they did this past year. This automatically makes the 'need' for a top 4 RHD a lot less important.
I agree with all of this, and think that shifting Rielly over to his right side is more than sufficient as far as balancing out our talents on the blueline.
I would consider either of these to be strong lineups between our forward group and Andy:
Gardiner - Rielly
Hainsey/Dermott - Zaitsev
Dermott/Hainsey - Carrick
or
Dermott - Rielly
Gardiner - Carrick
Hainsey - Zaitsev
With further development from Rielly, Dermott, Zaitsev and Carrick to be expected, and guys like Liljegren, Sandin, Durzi, Rosen, Borgman, Rasanen, and Hollowell in the wings, I don't have a worry in the world as far as our defense is concerned, unless Gardiner wants more than $6M long-term.