I dont think the the game favors GVs other than a skill level. While "fighting" (and I use that term VERY loosely as more often than not it is spawn camping) in GV has it's own set of skills, not as many are needed to be learned as dose flying especially if all you do is spawn camp.
So those that find flying a fighter "just too hard" opt to make high alt buff runs, or hide in the trees at a spawn in a GV. This takes away from the numbers in the air fighting which leads to more and more people leaving to find games that are more entertaining.
Last night Rooks and Knits had a fun fight going at 33. Knits were defending, Rooks attacking. There were fights from 10-12k and down to the deck. There were GVs in and around the town, and the occasional buff group that came in. It lasted over an hour and was still going on when I logged. It seemed like everyone was having fun.
What was different? Attackers didn't hose the field, nor did they de-ack. Defenders didn't go out and pork front line Rook bases to slow the attack (like the Bish had along the other front killing any kind of action there). Defenders didn't spawn camp the Rooks spawn, nor did the Rook vehicles go near the field to vulch or spawn camp the defending vehicles coming out. I did hear once that the ORDs had been dropped, but for the most part is was a good old fun fight with many styles of play covered, EVERYONE was having fun.
What was different? These are the fights I live for and wish we had more of. If I could bottle what ever was different last night Id give it away free to have that kind of fun every night.
I dont think the game "favors" one type of play over any other, but game play can do so easily. Last night we had the "right" players to generate a great fight for many styles of play. Tonight it may be geared more toward NOEs or GV spawn camping, but its the players who decide, not the game.