Shane said just because he worked on it doesn't mean it would definitely be added and that if is WAS added it can be disabled at any time afterwards if it's not beneficial
Also bosses will start to give coins meaning it can be used without paying real money, that would just be an option
You could also use the IV re-roll and end up with worse stats than you started anyway
also to highlight the cost of this proposed IV re-roll
the base price is 20 coins + 12 coins for every stat you want to re-roll and then each re-roll could be anywhere between 1-31
so If you want to hold 2 IVs you may already have at 31, that's 48 coins per roll with no guarantee the remaining 4 IVs being re-rolled are even going to end up above 5 each
The actual cost to eventually get a 6x31 poke unless you have extremely good luck would be massive, it's not going to be a situation where every PVP team will be 6x31 within a week or if it is, that persons just helped a LOT to keeping the PRO servers online for a while on their own
In short term, maybe it will work as you claim it to be. However, considering the negative feedback and the quitting players just by the idea of it. Overall donation ratio will decrease with the players, since logicaly no one will buy the capsule item every day (unless they're all related to bill gates). Economicaly thinking, it will cause a decline in server funds more than increasing it in the long run. Making it a bad idea in long term.