The admin has a lot of power. One of the power in admins hand is that the admin can call function file in AstariaRouter.sol to change the parameter change.
The parameters that can be changed are 
The rest of change is address change. The above change is the parameter related change.
Now let us study the impact of adjusting these parameters:
Change auction window and auction window buffer does not affect old and ongoing liquidation because when the liquidation is created, the code take a snapshot of auctionWindowMax and apply to liquidation auction
Changing numerator and denominator for liquidation fee can affect ongoing liquidation before the liquidation is settled. The liquidation fee is adjust up before the liqudation is settled. The amount of payment may be not enough to pay the oustanding debt and lender can bear the loss.
Changing numerator and denominator for protocol fee can does not impact on-going loan term because the old protocol fee is paid before.
Changing buyout fee can impact ongoing lien buyout for sure. Inconsistent buyout fee can be paid in different buyoutLien transaction.
Changing minInterestBPS, minDurationIncrease can impact ongoing loans refinance condition.
We recommend the protocol take a snapshot of the parameter when the loan term is created and not let ongoing changed parameter setting affect the active loan which is not fair for both lender and borrower.
