If you win a ranked game and the LP you earn puts you over the 100 LP required to enter promos...
Give us a portion of the remainder of that LP based on how well we do in promos. If we win 2 promos without a loss, 75-100 percent of it. If we only have 1 loss, give us 50-75 percent of that LP.
Example: Im at 97 LP. I win a game that gives me 19 LP. If I complete my promos with no losses, maybe I move to the next division starting at 16 LP. If I suffer 1 loss, then 8 LP.
Being anywhere more than 95 LP and needing 1 more win to get promos fucking sucks. That LP just vanishes completely. It feels awful and there't no real justification for it IMO.