Observations about the system:
It is much more beneficial to “true” free to play player, as it takes only base RP into account.
What i would change:
I would remove limitation of removal of the bonus upon purchasing of top vehicle. This feature is hostile to the player for no apparent reason. There are multiple top vehicles, an on multiple tt you can reach top rank while leaving a decent chunk of the tt not researched. I will use an example of my own TT.
Im missing 15 vehicles from this TT, and as i bought the top vehicle, i am excluded from the bonus to all of them. That is hostile for no reason, if i had the power i would make that bonus be applied no matter if you have a top vehicle or not. Especially that getting more than 1 TT with top vechicle gives you nothing at all.
What i would like to be changed:
Make the bonus apply to total RP, or increase the amount of battles. Many players would like it to be permanent, but i assume Gaijin devs do not want that. So that is why they went with 3 games per vehicle type. But in that situation the bonus is underwhelming. Players would expect if its only 3 games its a tradeoff for a big bonus. Currently it is not. I would like it more, if it were to be changed to total RP, so things like premium, talisman and boosters are also counted. If that is not possible, i would like it if amount of battles it applies to is increased, 3 is quite underwhelming.
Increase based on amount of TT: Lets use a exemplary player. That player spent countles hours researching multiple TTs, and is left with for example 2 TT left, the player is not rewarded for their dedication, they get the same bonus as someone who got just one TT. I would like it more, if bonus was increased based on amount of TT player has top vehicle in. It would encoureage players to grind more, while at least partially mitigating frustarion from grinding again and again, that causes players to quit.
Bonus for lower eras: I dont know why there is none. Grind there also takes time, so why is the help not apllied there? I would like it more, if the bonus RP were also apllied to lower eras, after all, that is where the new nation is started. It would also help mitigate seal clubbing, as the less time experience players spend in lower eras the better for new players.
Ability to sellect when to apply the bonus. As it is limited in numbers, ability to apply it when ever player wants would be a good change for the players, as they could apply it to good games, deincreasing the level of flustration, that will rise after wasting it on a bad game. I would like it more, if we as players could sellect when to apply it.
This sums up my feedback.