Petri, would you mind considering crafting legendary items, instead of limit breakers?
Everything can stay the same (quests, etc,…), only change would be, that legendary heroes can only shift stats to fine tune them, instead of another boost. I am sure a larger portion of community would support this idea, in contrast to very negative response to limit breakers…
Its what I described here : Heroes equipment - #8 by Cerevan_the_Omni
You would earn basically the same, while keeping better integrity of game, from balance standpoint while also offering a more flexible option, with which players can toy with and experiment.