WarThunder player here. Both Warthunder and COTW have quite a steep learning curve. As others have already pointed out, it would be interesting for veteran players to crank up the difficulty, in the sense of making the game more challenging and maybe more realistic, and thereby more rewarding as well as allowing for a longer motivation. Warthunder for example has 3 main different game modes: Arcade, Realistic and Simulator. Basically, the game is providing less and less help and indications as well as HUD elements, and becomes more realistic and immersible, while being much less forgiving.
Overall, I think a system of two or three difficulty modes could make the game more forgiving in the beginning, teaching the way of the hunter to a broader audience, while providing a challenging and rewarding setting for the veterans. In addition, it would offer some replayability, which is a feature often requested. Having such a different options of gameplay would enable a much broader community to support the game. More details in the comments / follow-up.