Wisdom is still important in healing formula. The attack, DMG and hp buff change was to not exclude newer players without min maxed gear.
Furthermore iirc in discord was also said, that there will be changes in future get a bit more benefit from wisdom, but attack buff and others will remain or gear score.
And from a balancing perspective it was a good move. Gear Score is very limited and can easily be balanced comparing to crazy min maxing wisdom values especially when it comes to new content