Unfortunately no matter what system is in place, not everyone will be pleased. But I don't see this change making much of a difference in the long run and if anything will just benefit our f2p players.
And I have to agree with SSM, the players who don't own SVAs will still have to make the grind and it will likely take them much longer to reach it if they even do. There is still the benefit of skipping a 2.5mil mana grind at the start of the season with no Trench to reach the level of an SVA. By that time, players with vaulted fortune 30-35 will have their items. (Unless you're Softi)
For the market prices, I don't see them changing. Fortune is currently capped at 25 and f25 pickaxes are worth 25 cubits, f30 pickaxes are worth 30-35. With the fortune cap being set to 30, fortune 25 is still obtainable and the price of f25 pickaxes will likely stay at 25 cubits, leaving f30 to remain at 30 cubits.