I just read through this. Your game fixes so many things that make players feel powerless like not being able to avoid an attack, dying straight away at 0 HP, having enemies save against their special effects without making all characters high magic using spell slinging 1st levels. I also appreciate the way you keep character classes similarly powered to 2e but allow for a lot of out the gate, simple customization, which is one thing a lot of people miss when moving from 5e to old school games.
I will be sharing this with everyone I know who loves RPGs!