The main problem here is that it was quite difficult to earn 10k lxp.but someone who earns 5k lxp can qualify for the maximum reward with 2 wallets.this is not the right approach.the difference between the tiers should not be so small.this only pleases sybil accounts with thousands of wallets.as the tier level increases, the reward rate should increase much more.there are not many people in the high tier anyway.stop usurping their rights.
The percentages by which we multiply can always be modified to even lower values for portfolios with smaller amounts of lxp.
And the second thing is that you count wrong
A wallet with 5k lxp will receive 50% of the tokens, i.e. 2,500.
In order for sybil to get 10k tokens, he must have 4 such wallets.
But seriously, I agree with your approach (I have a 10k+ lxp wallet myself) and I think Linea will organize it well