On the contrary, if it encourages defending fields, which results in more actual fighting over things (the main component of gameplay), then perkfarming in it is just fine. Besides, it's pretty easy to rack up GV points as it is, so I don't really think earning points is that much of an issue. If you're determined, you're going to get them in something, be it the WW, M8, T34, M16, or whatever strikes your fancy.