With those dynamic ranges I am guessing you want to incentive longer staking the same way in Dan's proposal? In my opinion there will be conflict of interest between 1 month stakers and 5 years stakers as 5 year stake have so much leverage against shorter stakers with less tokens invested

If someone decides to lock their tokens up for 5 years, then they obviously should have a higher return on their investment, than somebody who locks it up for 1 month. That's simple incentive theory.