Daveiiwhy do valve not like 6s? have people actually spoken to them about 6s vs hl ?
About a year ago, Sal and eXtine meet with the TF2 team and discussed competitive tf2 and the possibility of a match making system.
Valve's main problem with 6's is that it is drastically different from pubs or the "standard" game, compared to other games with competitive scenes at least. If you look at games with high support for the competitive scene (Dota, LoL, Starcraft, CS:GO, Smite, even fucking Hearthstone), the pubbers and the top tier players are playing the same game with the same rules. When the average Dota player watches the International, they pretty much know what is going on.
When the average TF2 player watchs an ESEA lan, they wouldn't know exactly why things are the way they are. Why are there only 6 players on each team? Why is there a limit of 2 on soldier and scout but only one demoman and medic? Why are they only playing to 5 rounds? Why are all of these weapons banned but these aren't?
This gap in rules is why Valve is not going to really support the way 6s is currently setup. Highlander has a much smaller gap for players to jump, so it is more likely Valve would be willing to implement that kind of system into TF2.