So?
- Transonic features a 1.2x difference
- Supersonic to High Hypersonic+ never gets over a 3x gap between high and low
- MHS is a 10x difference
- MHS+ is a 8.8x difference
- Sub-Rel to Rel+ never goes over a 5x gap
If anything the FTL scale is massively generous in its gap
I mean, if your claim is to adjust MFTL to be about stellar and galactic distances sure, but even then its an arbitrary metric
Because like 3-A or 1-B after a certain point any non-infinite number will have to thrown into one category. Quadrillions of times FTL is still not infinite. Its just a weakness of trying to tier numbers that will have a large non-infinite number.