You should be able to skip Ranked Division tiers if you do extremely well in series.
As title says, if a player Does extremely well in a series, they should be able to skip 1-2 tiers. E.g. Move from B5 to B3, if they got over A+ in every game in series. Or atleast start with a bit of LP in the next tier, Example. Move from B5 to B4 with 5 lp for Every A+ 10lp for every S- or higher based on Series results.