If at some point, Valve chooses to implement Highlander Lobbies, it's just a virtuous cycle, for Highlander as well as 6's.
At first, only Highlander will have their own Lobbies. We (in cooperation with Valve) work out the minimum standard rules for the Pick/Ban list and the lobbies should get on their way.
Once Valve sees that this system is helping them rebalance some of their weapons, they will comply with implementing it into 6's. Same thing happens, we help with the Pick/Ban list. But in the end few things will change for 6's. Some of the OP weapons will get rebalanced, but very few 'new' weapons will be used, because they aren't versatile or mobile enough and Valve should be able to recognize this (hopefully).
Once they see this, we don't automatically have our beloved 6's supported, but at least we're at equal playing field with Valve about 6's. They will see that everything has a reason and that nothing is banned because the weapons aren't liked.