I mean I recently got the Vally of Death pack for Operation Flashpoint: Red River.
It cost me £5 and I got 8 new Fire Team Engagement missions. Which are basically 4 20 min missions, 2 30 min missions and 2 1 hour 30 min missions.
I am happy to recomend it. Because adding what is essentially 8 new missions in a campaign that is completely unrelated to the games story is similar to what you did get from a cheap expansion pack.
It is stuff like the ME3 DLC described. Which is basicaly cutting a section of the game out and saying "we'll only give you it if you pay more money". Like TB said, the game isen't really "content complete" on purchase. Which is stupid.