I think it is an improvement. For example, format allows the gith lineage to make githyanki and githzerai very different from each other. It allows the wood elf and the astral elf to be very different from each other.
Do you actually think they will be?
Are Gem Dragonborn 'very different' from Chromatic Dragonborn?
2 or 3 rules. Thats it.
I mean lets crack open MToF.
First, we remove what is no longer distinct. Remember we cannot assume culture, setting, location anymore.
ASI
Alignment
Age
Size
Speed
Language
Then we get
Githyanki
Decadent Mastery (Locational, this could easily be gone)
Martial Prodigy (Cultural, this is gone probably)
Githyanki Psionics - Maybe we get to keep this.
Githzerai
Mental Discipline (Cultural, why assume all learn from monastic masters...)
Githzerai Psionics - Maybe we get to keep this.
Thats your templated, 'non setting' generic Gith. 2 slightly different
psionic spell lists.