lmao, it doesnt ruin the game in any way because with the current upgrade system u can spend 200+ stones and dont get a single +15.. yes that's right, and not making anything up, taking from experience. I spent over 250 purple stones+ the same amount in u70whites on a gloves in POB with the exact same upgrade system and guess the final result... +5.... SO.... the upgrade system sucks and I already made a thread about it some time ago. Point is, having many stones doesn't guarantee anything.
That just proves that you aren't very good at upgrading.