I will agree that there is no clean solution, really - people gonna shit it up no matter what the rules are.
As for Mankind Divided, it's basically a case of people being completely allergic to the word "microtransactions." The campaign mode in the game (99% of the reason you would buy this game) remains completely unaffected - its balanced as its own game and requires no purchasing of anything (I'm not sure if you even CAN purchase things for use in the campaign). Here and there, items are hidden which you can scan with a mobile app to get some extra lore or something, but it's not like Destiny where you need them to understand what the hell is going on. It's just a silly add-in that is completely optional and often hidden. Basically, it's a non-issue but people hear "DLC" or "microtransacations" and basically go "fuck fuck fuck, fuck this, fuck you Square" etc.
In terms of DLC, yeah it has a shitty season pass, but the preorder DLC is like... nothing. Two outfits which affect nothing in-game, and a starter pack with a silenced pistol and some aug upgrades. I have it but I chose to disable it because it's that unnecessary.
Isn't the issue with Deus Ex that they offered pre-order bonuses that people thought they would be able to use in any save and after launch the developers changed their description to "consumables"? That sounds misleading and scummy as hell and it obviously bothers some people more than it does others.