It's a fair point but it's not like valve have tried in terms of weapon balance in an attempt to change the meta whatsoever. People seem to act like it's the player's fault in some way that it is the way it is. Valve can't just add weapons which are straight up broken or gimmicks and then expect them to evolve the 6es meta in some way. There are only a few weapons in 6es that are disallowed everywhere and aren't straight up broken which are weapons which the best counter to in 6es is to use the same weapon which actually kills weapon diversity and is often less interesting than watching both classes run the stock. It's also not reasonable for them to expect no whitelist whatsoever when games like dota have bans for heros that are overpowered.
In addition to this, valve and the playerbase places far too much value on what unlocks can do when a huge number of them don't change the way you play the game at all. Valve tries to balance some classes through adding unlocks which make them better, which doesn't really address the problem with the class and also often makes an already specialist class better at its specialist role without making it better at generally. They then don't seem to understand why certain classes are only run as offclasses and not all the time when they don't add weapons which make the class better in any situation outside of what they'd already be doing. See:Reserve Shooter, Rescue Ranger.
I'm sorry but they can't have their cake and eat it too with respect to the meta, if they want to see it change they need to give us something to work with. If their idea of a competitive mode is 12v12 with no whitelist (as a lot of people tend to say their testing mode and what they "balance" around is) then they really have no idea what they're doing.