Looking at the spreadsheet, I think those rolls are awesome all the way around... we just have to move some 'mechs to better match movement rates.
Personally, I think we should have the stock Vulcan so we have an AC/2 in the mix.
The Shadow Hawk should swap into the Cavalry Lance, and the Whitworth into the Support Lance. That makes the third one basically Recon again. And with the P-Hawk and Vulcan paired up, the Scorpion and Hermes can too. Split like that, that lance could cover more territory. If we got with the stick Vulcan, anti-infantry capability is covered, so the P-Hawk can be a D without Machine Guns. And if we could shift two points from the P-Hawk's CT to its Head, I'd feel a whole lot better about it.