I don't understand what's the point of the grey bases advantages. Because when you capture a grey base you already have an advantage since it gives you bonus points. So by adding another advantage on top of that like seasparrow/minigun is going to make it extremely unbalanced, because the team with the most players will already have an advantage since they will be able to capture more bases thus having those bonus points, and to add to that bonus points advantage they will also have the grey base advantage, how is that fair? You are giving 2 advantages for capturing 1 base; the bonus point advantage and the grey base advantage.
Not only will this make it even harder for the team who is outnumbered,(which will be already at a big disadvantage since it will be outnumbered) it will make it pratically impossible for any comeback to happen like it happened in VW1.
So my suggestion would be to either remove the grey base advantages or to remove the bonus base points. It's just silly to have both of those advantages for capturing only 1 base. Either that or make the grey base advantages not so good. For example the advantages of grey base #3 and #4 are a bit lackluster compared to how good the advantages of base #1 and #2 are. Base #1 has a minigun which has a ridiculous fire rate considering how strong it is, and kills anything in moments and Base #2 is even better, it has an heli(seasparrow) which is the fastest way to move in the game and despite of that it has aimbot. Imo removing the grey base advantages would be the way to go because those 2 bases are just too good.
Also one thing we should have into account is that 5 hours into the event, money will no longer be a problem for consistent players, so forget gun fights, it will be the seasparrow and the minigun killing everyone despite of the rising of price of both.