Your absolutely spot on, but then, that requires them not to overstep, and iv seen plenty of coop games overstep to push for more profit. The easy one is to release some premium broken piece of equipment. Get the youtubers talking about it, that it's OP, let it stay OP for a month as eveyone buys it, nerf it into the floor for "balance reasons," release the next OP piece of equipment the following week and repeat the cycle above.
Helldivers was, however helldivers didn't have a rotating shop front for gear either, see the issue? Your trusting based on past experience of the prior title and iv been through the whole Vermintide to Darktide experience to know how far assumptions get you on what a sequel is like.
Don't get me wrong, I've got a preorder down, but this "trust in the developers" needs to be proven to PC players after the nGuard debacle and the FOMO store front reveal, can't wait to see that every item is 2200 in the store and packs of Magic Money are sold for 2000 +100 free BONUS credits. With the lowest being sold in packs of 500. Trust is not the defualt position with a GaaS, it never should be.