I agree to this too. My main gripe is the weekly currency, I know the intended want is to keep players playing as MUCH as you can, split progression over 4 characters because more to farm = more time to invest = may spend money on cosmetics/dlc.
But it also creates a ton of burnout, because you may not want to play the Veteran this week, oh well guess you lose 1500 weekly currency on him, sucks to be you if you want that nice cosmetic (since cosmetics will be a part of the buyables in the weekly currency shop).
You get punished for not wanting to play Veteran, and you may even lose interest because of it.
And by making it shared, you can play whatever class you want for the week. If you just feel like playing ogryn and psyker, well you do that. Thats 3000 currency across characters, so if there is a nice cosmetic one some day for lets say Zealot you can just get that. Instead of first needing to grind your rear off to get the currency on Zealot specifically and then buy it.
But how it is now, you have to grind 4 classes each week (which might take per class about 15 hours, no I am not joking, there is a contract that makes you win 25 games, a game takes about 20 minutes. and the “kill 500/750/1000 of X enemy” isnt any better). And on top of that grind, you need to play in a specific way to achieve it. Which is not fun long-term.
Also, that gold is also not shared makes me just not want to experiment with other weapons because “well I need to do 3 missions for this gun, do I really want to gamble on if its good or not?”.
All currencies should be shared (gold, weekly currency and whatever they add in the future), as how it is now it limits you to choose the best way and punish experimentation. It will only hurt players trying to keep playing the game to not have it shared.