In my opinion, everyone who takes part in the initial liquidity mining program is an early supporter.
The earlier you started, the more you were able to earn at high rates of emissions.
So early supporters already have considerable advantages as you mentioned, but also the rates of emissions will not always be as they are now. So if you’re a newcomer a month from now, you will have a smaller % of supply distributed your way already.
Adding any cut on top of that would be disincentivizing for new entrants, and thus the total amount of value in the system would likely get lower comparatively.
There are no thresholds for larger and smaller accounts, what matters is the ratio of what you have in Badger compared to what you have in BTC in Setts.
It will naturally be easier for smaller accounts to get higher ratios, but the point is about BTC earning / Badger held ratio.
I estimate that the majority of early supporters who use the Setts will be better off with this change compared to the current system.
But there will be no mechanic here that puts one Badger holder into an advantageous position over another Badger holder.
That is, 1 Badger = 1 Badger.
1 Badger /= 0.33 Badger of a Badger that has been owned for a month longer.
Iirc the original multiplier was meant to be active for the first 8 weeks of the program, not forever.
The new multiplier will bring utility and demand to Badger token, which think is the most fruitful outcome for the early supporters.
Also please keep in mind, that the orignial multiplier doesn’t reward the early supporter per se. It rewards all the addresses that have been staking for 1 month. So in December 2021 ‘early supporter’ would be the address that started staking in November 2021.