This separate position rank is kinda messed up

I thought players were supposed to be rewarded for playing diverse roles? Now it takes forever to go up in rank if I play several roles (even with the splash effect) honestly if this is gonna be permanent I think the only thing that might make it worth it is if the splash is bigger. For example I usually get around 20 LP for the position I play at that moment (if I win) which is the same amount I got last year and the splash effect adds 3 to the other positions I have played this means that if I play an even amount of games over 3 positions, it will still take nearly 3X the amount of games to go up in rank than it did last season right?? Also I lose 3 LP for those positions in a loss as well.