What doesn't work is the fact oasis is not trying in any way to work on balancement.

The reason why the upgrade of rune cap was bad is because it follows and links directly to another cap increase we recently had that many of us seem to forget: treasure tool one.

I don't know how many gold orbs are required to level something from 17 to 18 and from 18 to 19, but I'm quite sure once you reach all level 14 runes by fully going in the rebates you also are at level 19/20 with the main tool.

The sum of the two things is a way too big unbalancement and this one is the main reason why rune level 13/14 shouldn't have been added.