Are there any plans to reduce the upgrade cost of a card via the stardom mechanic/diamonds upgrade button according to the numeric value of the individual attributes on that card ?
So 14 -> 15 does cost less than 1 -> 15.
I made the majority of my cards with the stones (some before stardom even got introduced), that seem to be more or less only usefull for getting the 4 desired stats nowadays. Atm it's only worth to either pay diamonds to max out your card instantly, or farm all 5 stars and then upgrade to max.
In other words, I have more or less lost the diamonds I've invested into the cards, since I have to pay the same amount to max out as if the card was vanilla with 4 stats.
It would be quite upsetting if all those diamonds invested into the randomizing stones are just wasted.