I actually asked about this matter a long time ago on the old forum, and one of the staff members replied that this was changed, because players didn’t want low rank vehicle in the BP, but wanted the free premium time instead.
When I asked who wanted this change, because I never saw anyone talking about this on the forum, the same staff member replied that our International forum is not the only place where opinions come from. So he basically suggested that the Russian players wanted this change on the Russian forum.
For Gaijin it was obviously a very good change, as they don’t have to prepare an additional vehicle in every BP. I still think it was a terrible decision, because these rank 1 premiums were often fun!
I’m also sure that if someone suggested this change on the Russian forum, they probably assumed something like 30 days of premium time. I don’t think the 10 days of premium is an equivalent of 1 unique vehicle (these low-ranked vehicles were usually fun and unique).
I feel pretty much the same way as you, but remember that numbers matter. For Gaijin it matters how much it costs to make one more vehicle and how much they lose after reducing number of vehicles in the Battle Pass.
If someone says that they don’t like the new system, but still buys the BP, then Gaijin is a clear winner. The same goes for the new event cycle, SL lootboxes with event vehicles and so on. It’s the players that decide about such things, even if they don’t realize it.
Imagine the situation where Gaijin release the new BP and no one buys it. It wouldn’t take long for Gaijin to increase the value of this BP, because creating the BP costs them money, and the BP itself is a way for them to make money.
An ideal situation for Gaijin would be to put the least effort possible into the next BP, and gain as much money as possible from it. If they reduce the value of the BP and players still buy the BP, nothing will change, that’s just how it works. I think they are now pushing the limits and seeing how many players will still decide to buy the BP.