tfishell: (...)
Is there hardly any content for the single-player campaign? Otherwise, as long as the requirement for a Neocore account for single-player is dropped, I think it'd be an acceptable release.
Hitman did have the offline option, castrated as it was. You could progress in the story, replay levels - what was hidden behind server verification was all the progress checks and unlockables, customisation, start positions (so everything that would ever make you consider to actually replay any of the scenarios).
In here, situation is a bit similar, though not quite as bad.
The singleplayer core is your typical aRPG run of the mill grind - after you finish the story campaign, you do proc-gen missions, get loot, sell it/disassemble/craft/upgrade/echnant/whatever, so you get that +1 and can go clear higher level proc-gen missions. From what I gather, aside from PvP arena, there is actually no co-op/multiplayer exclusive content - even the DLCs that add specific mission types (Citty of Suffering, for example), can be done single-player just as well.
From what's hard-gated behind the internet connection, I guess are seasonal events, seasons themselves, weekly bonuses (so things that break the repetitiveness a bit), and obviously leaderboards, mailbox, co-op option and pvp. Of course that's hard to judge since constant internet connection is required for all the time (it won't even let you through the splash screen if you're offline).