There is no problem with the premium jet itself if it is confined to rank 6 or higher jets in ARBs.
The problem is that new players don’t want to do PvP, and base bombing negatively affects all of their teammates.
The fact that the US teams with BR 10.0-11.3BR actually have a fat L is mostly due to the dumb bombing F-5C and F-4S, and if they actually used them as fighters, the WR of the US teams would skyrocket.
From a marketing standpoint, I am against letting new players limit their ability to buy premium jets, but there needs to be a mechanism to force them to actually PvP such as nerfing base bombing rewards or rework gamemode itself.