No.
Just no.
What you propose is not a solution. As most people I have a serious pvp account and a fun pvp account, that's already more than enough.
You identified that ladder players stop once they are on ladder (i.e the problem statement), yet your solution doesn't deal with that at all.
Why are players not playing once on ladder ? This is the question you should ask yourself.
- 1 : they want to secure their ladder reward (end of season reward) which is today more than ever (thanks to the token shop) a better way to farm tokens/pvp coins than farming chests by battling directly.
- 2 : Playing more exposes them to lose rating and potentially drop from ladder and for what ? Some chests that will reward you Fake Tears TMs in 90% of the time ?
So in the end, when you are comfortably sitting on ladder you have little to no reason for battling more. No incentive.
My counter proposal to fix that :
- I know that it's not gonna be popular but i think the fact people laddering can change their pvp coins reward with tokens was a bad idea. The pvp coins shop is already mostly dead (beside items like rerolls, pvp items, etc...). Nobody is looking for Pvp mounts anymore. People are all after "new" rare mounts and cosmetics from chests. So it's overall better to secure your pvp coins reward and exchange it for tokens then potentially chests than directly battling for your chests.
- The golden chests reward given every now and then to ladder players is a good example of incentive, it implies that people right under ladder while want to challenge those above to grab their chests. However the fact the golden chests are "barely" any better than the blue ones is often disappointing and it kinda loses its interests for people to battle seriously.
Today there are so many common rewards that are totally useless (metal claw, fake tears, charm, etc...) that the good rewards which are considerably rarer never drop.
The Pvp chests update was a huge and appreciated update however, i consider it seriously flawed at the moment for the game & players to fully benefit from it.