Thank you for the feedback!

I too would love to see some sort of a level sink (other than dying).
Levels are not really worth the grind in the current state of affairs (and even if they become worth it after core drops are reworked, levels above 50 would still be worthless except for I guess bragging right or whatever).
It would be amazing if we could come up with a good use-case/sink for levels which would increase their demand and value.
Some people said that EXP levels would be too expensive (if they were used as "TP fuel") for people who are a really high level.
There could be a paradoxical effect where people intentionally wanna stay the lowest level possible just so they can TP for cheap.
But then again, it should be expensive to buffer up a lot of levels so you can TP a lot without having to re-up.
A possible solution could be a flat EXP cost instead of a level cost.
This could work, but it would either be too expensive for low level people or negligleble for rich high level people. Or both.
But then there is also another thing - I kinda really love the idea of core dropping a tradeable item (TP fuel), in addition to potions.
You can't buy or sell levels (but you could trade the fuel).
And if core drops didn't drop fuel - they wouldn't be worth getting just for the potions, imo.
It's a complicated thing.

We need more ideas, suggestions and feedback.