BFV is really good for graphic updates, as the terrain is terrific, but it is limited. It's Vietnam as you know. Weeds, and wooden bridges are very cool, but wear off in time. For what it is, it's well done.
So is the new interface. The "Q" key funtion is nice, but overall I'd say I like BF1942 WWII maps and the DC MODS as much, maybe better, pry because after time they are as much fun, and it's more varied. That and I get killed in BVN all the time by nme I can't even see. The AI seems bugged, where in BF42 it was you never got shot unless you could see your attacker.
It's still worth getting to see if you like it, and I bought it just to support the company.