FYI, I went the other way completely, and in a moment of pure shattered mind, I decided that players would gain most of their features from classes and archetypes at level 1! I thought: are high level features really that powerful and need to be gated behind a high level? I took a good look at Land Stride, and I got my answer.
Further level add more uses of said features, but say a fighter, would gain 1 use of Second Wind, 1 use of Action Surge, 1 use of Indomitable per day, with one more use each 4 levels or so. A champion (taken also at 1st level) also has a crit range of 18-20, 1 extra fighting style and remarkable athlete (revamped because it suck as a feature!). Only extra attacks were left at 5/11/17.
It would seem it is somewhat close to 2e, since I based myself on the class progression of BG2.