I'll go with no. You can see ppl going +12 or more everyday. And there are a lot of ppl with +12 or more. They just don't let you see their EQ. If you would see that all, you wouldn't suggest this xD
If you don't wanna "waste" a purple/green stone cuz there is a chance to get +1, then i suggest to farm a lot and get like 100x blue/red stones and 100x white stones and spam it. Purple/Green stones are just little short cuts that comes with RNG gamble. It's not meant to give you the best result. And it's good that way.
Also why are your suggestions always made for making things easier? I know you wrote you see ppl complain, but those ppl are usually the ones that try with like 2 or 3 purple stones in a row, get f*cked and start complaining. Hate me or not, it's basically the noobs.
You said it won't make upgrade easy. Well it does. Only fear using purple/green stone would be to hit fail/broke. If i get success i can at least expect getting +2.
And since by now everyone here should know that i wanna see this game get a little harder, i'd like to add the following to this suggestion, that won't happen anyways xD...
Additional suggestion to "Always have advance stones give +2 or 3 when success" ---> Always have advance stones give +2 or 3 when success and getting old break option back to compensate for making things easier.
If you are a f2p player, make a PvE char for farming. And farm a lot. A f*cking lot. Well...if you have the time and patience to do so. You can get to where cashers are by farming a lot. And you get many stones to spam upgrade. In 55 cap i started farming for u60 stones to prepare for lvl 60 and had about 150x blue and red U60. And about 25x green and purple. If i can do this, then you all can get that amount too. Just f*cking farm right and do it a lot! Then we won't have to talk about suggestions like these....