Most of that list needs to be looked at. Not even sure DE wants the same system I do.
1, Riven system at the moment is deeply flawed, impossible to get the riven you want. Unless DE changes how rivens work which is technically difficult.
2, Outside of some minor changes could use resource system like helminth. a
3, Kuva needs to be changed, again I would look towards less RNG more helminth resource system.
4, Base stats need to increase 5% turns into 15% without any upgrades. Add crit mod and follows the normal rules. So everything increases by set amount which you can i