Tbh low stone drop rate makes the game way way harder for free2play players and put fb+7 set behind a huge paywall (probably thats why Valentia,Elamidas,Electus had a 3x higher droprate)
low droprate only prevents the "casual" players to get +7 fb 80% stats, the donators will get it in no time and are super ahead of the others
blabla im a donator so I couldnt care less but thats my opinion..
solo botting got 0 str 1 int stones in the time