The only part I can think of to add is a power meter. (Although others are perfectly happy without a power meter.) Otherwise it is complete as-is.It should be very close to gravel bike nirvana, light and fast like a road bike on ordinary roads but robust enough to handle rough stuff people ride on mountain bikes.
I very much understand!If I can get the frame unloaded first I'd be willing to part with the wheels
(otherwise, I'm thinking of building it up to complete bike again, and would need the wheels)