We just need more BR brackets. Arguably the most important “gap” should be around 3.0, as a bad first experience can push away new players.
1.0 to 2.7 is fairly balanced, with vehicles having gradual improvements. There’s definitely some outliers here that could go up or down 0.3, but on the whole it’s pretty good. The biggest issue is once a new player gets to 2.0, now they’re seeing M4A3 105’s which might as well be a Jumbo. 2.3 and 2.7 are worse, as now you’re uptiered against M4A1/M4/T-34/PzIV/etc.
The B1 Bis for example has sub-60mm of penetration at 100m, and it’s not even APCBC. It can struggle to penetrate the Pz IV F2, a vehicle that’s known to be poorly armoured.