Here's where I intend to have some fun...
BPV affects more than just the AI draw. It also influences the price someone has to pay in the shipyard. That has to be kept in mind when you're talking BPV.
Also, there's "racial flavor" to keep in mind. Mirak effectively "suck" in PvP. They always have, and short of making them Klingons, they always will. Plasma boats, especially PPD-using ISC or properly-handled Romulans, are some of the toughest PvP customers on the map. Without major shiplist reconstruction, the PvP imbalance will always remain.
So, let's look past pure-hex flipping speed, and look at the whole picture. Your BPV proposal will make for slightly cheaper Plasma ships, tougher anti-plasma AI draws (possibly facing CLs or CAs in your drone boats, slowing you down somewhat), equalize hex flipping speed across the board, but leave the Mirak / droner on the short end of the PvP stick.
That is unbalancing. Who would want a pure drone boat when they can flip at rapid speeds
while enjoying PvP benefits with Plasma?
In my personal quest for "balance" of some sort, I don't like that. If I, representing Plasma, get a benefit, you, representing Mirak / droner, need one too. And not just a return to the "status quo" of fastest hex flipper when Plasma ships start tying you in flipping speed...
So, I recommend this:
Go with a DIP-like system. Per SFB, the source of this game, ships should have their
master BPV increased for things like drone loadout. For the entire existance of SFC, that has never happened. DIP has implemented this never-represented surcharge, but in a more SFC-friendly manner. Also, DIP has reclassed ship prices so that whether Plasma or Drones, people need to pay the same PP to get the same strength.
Steps in the right direction.
There was one thing missing from this maneuver. Now that droners need to pay Plasma-esque prices for their ships, they should be
given Plasma-esque like operating characteristics.
Specifically, more free reloads and cheaper drone speed upgrades. The free reloads, on some kind of system to represent the SFB-source while accounting for doubled internals, will help droners stay in the field longer without mandatory resupply. The cheaper speed upgrades will minimize the PP hit when faster drones are aquired.
I've always liked the following SFB to SFC reload rate:
1 SFB reload (most non-bombardment ships prior to 2275) = 3 SFC reloads
2 SFB reload (bombardment and everyone post-2275) = 5 SFC reloads
In a typical 2xB 2xC rack Mirak ship, this will equal 60-100 drones per mission. In a 6xB bombardment ship, this could be 108-180 free drones, at the last speed chosen, for free, each mission.
Plasma-esque prices, Plasma-esque operating characteristics. If you don't blow your shuttles / marines, you can stay out in the field for extended periods, with numerous (60-180) shots of your primary weapons. Also, since you get lots of free drones each mission, you're not paying for your ammo anymore, like plasma doesn't pay for their torpedoes...
And the kicker is, instead of affecting, at a minimum, 3 whole races (as a reduction in Plasma would require), the increase method only affects ships that use the weapon-in-issue, allows the keeping of "racial flavor", as Mirak will still hex-flip faster than plasma while Plasma still beats people in PvP, people pay nearly the same for the same combat ability and operating characteristics, and remains true to the spirit of the source.