Wizards not being able to heal in D&D, is the stupidest thing about D&D. Would be awesome if WOC would finally give Wizards ability to heal, since there is NO logical reason for them to not being able to heal, rather than to nerf and "balance" the class. Divine Soul Sorcerers can, Celestial Warlocks can, Bards, Druids, Clerics, dude, what the hell.
There absolutely is a logical reason for wizards not being able to heal, same as there is a logical reason for clerics not being able to shoot lightning bolts or levitate people. Arcane magic and divine magic are meant to be different. In a game system with 12 different classes, most of which are at least partly capable of spellcasting, there is a need to give each of them some form of identity. Constraints like these are actually beneficial.
I hope learning and casting spells from scrolls will get proper restrictions in time.