Been browsing by the workshop content, thus far I have found:
-A MGS1 remake, with most of the dialogues, sounds and level design.
-Operation Flashpoint Mission remakes.
-Wolfestein 3D, at least two versions of it.
-Payday 2 mission.
-At least 6-7 coop scuba diving missions (actually good ones).
-Tons of showcases.
-About 2-3 rally stages, in both Altis and straits.
I'm honestly ... blown by all this, I'm myself working on a mission and there are already hundreds of them, and actually most of them are decent ones. This kind of content makes you play this over and over and over again, is not like old ArmA II, is new ... you can do pretty much all you want and the workshop actually do work here.
As far as the actual BI content goes I'm pretty happy with, is more than I expected and is incredible, some new showcases are pretty mind-blowing (the one with the APC is my favourite one), and while I have played to no end Domination, I do miss some of the weekend ops, had one not long ago with the 7th Calvary and is pretty astonishing.
I'll be busy with GTA V, but this game is just amazing, is worth having a computer capable enough to play it. My only complain would be online performance, sure I can play most of the game in +30, but some servers do struggle and BI really need to work on that.