A lot of the major common points have already received answer either in recent Q and As or posts by Community Managers on the forum.
Regarding the Top BR range, we have said on several occasions that as soon as its possible to expand BR tiers in any area of the game without causing detrimental results, we will do so. It is not a case of us simply not doing something that can be done right now, its a case of something that is wanted but cannot be done without harm right now. There are a number of factors towards this.
Queue times is indeed a core focus above many others and its very easy to fall into the trap of saying "but I have 1 minute queue times all the time". Which, indeed is possible during EU and US prime times for example. But outside of those times, its not always the case. The game does not revolve around EU/US prime times. We have players all over the world, so whilst expanding BRs or creating new BR locks may work during the hours of prime times for some regions because the queues can support it, consider for example Australian/SEA prime time for example when there is typically overall a much lower player count. You cant switch BR ranges on and off over a 24 hour cycle to suit different regions. You also have to gather enough data over a constant period of time to assess that the numbers are indeed viable and sustainable to do so. For example, many people during the height of the pandemic when 100,000+ people where online on a daily basis and a new record reached used that as an example of asking why its not enough for BR expansion. The answer is again because that is an irregular occurrence of an external factor. Those numbers were not the normal for that time of year in the run up to summer and could not be used as a clear basis for what the numbers look like now or in 2 months for example. BR expansion is a one way trip, once you expand, you cannot revert, so you need to be 100% certain everything is ready and allow for the sustained change that will occur.
Similarly, introducing more "locked" brackets at 10.0 and 10.3 to self isolate them from themselves and 9.7 is exactly the same thing. All you are doing in effect is creating a BR 11.7 and 13 by simply moving those aircraft apart from each other and removing all other possible matchmaking ranges from their scope. This simply doesn't work in the long run with a small group of aircraft. Right now 10.0 + 10.3 is a large enough pool of aircraft to sustain its own bracket by itself. Splitting them apart from each other at the current moment has the exact same issues as before with a smaller pool of players for the matchmaker to use, less combinations of possible teams and less flexibility in weaker timezones to create matches.
The best way to help visualize this, is on an excel or google sheet, if you list all the aircraft from the top BRs, colour code the BR ranges and overlap, you can see exactly how many aircraft are in a given bracket and the range of what they can see. Cut that down too much, you loose vital numbers, scope and flexibility.
Once again, we understand people want to see an expansion to the top Air BRs and as soon as it is both sustainable and possible to deliver it, we will do so.
As we said previously, we dont exclude the possibility of further model reworks in the future.
The Razerbacks are not the same as the Bubbletop Thunderbolts and the Thunderbolts are also not the lowest quality models we have in game, so they wouldn't be priority for a rework even if some where to come soon.