GV'ing has recently become more diverse. In April of this year, HTC released an update that applied historically accurate tank sights to each respective tank. Previously, each tank had the exact same sight so each has the same ability to reach out to long ranges equally in terms of sighting for tank battles. That certainly was not the case in WWII. The Germans had by far the best optics in the war, everyone else was a distant second.
In think what would make GV'ing more fun is to introduce terrain that has fewer trees, more rolling hills, and some terrain obsticles that can NOT be traversed by tanks (gullys, rivers, etc). Also, have the risk of the infamous "bomb****" be absolute minimum.
It is a lot of fun when the front lines have moved enough that when you up a gv and look around you see no familiar terrain. being able to have legit gv battles on those terrains is a good time. In a number of cases, what I suggested earlier can be had on most maps, but it is 4-5 bases behind the original front.