Gameplay is missing features that were promised. If they will add it in free DLCs there's absolutely no problem.Expansions can serve this very purpose.
Not to mention other games have done it. If they want to ensure their game's longevity, they'll have to. Considering they're planning MP for 2022-2023... I'd say the long run and it's implications are definitely one of their concerns.
Not holding my breath but to say it doesn't or won't happen at this point in time is premature.
However, if DLCs are paid I will 100% be over with this whole company.