Well, bear in mind that on live Orisa currently benefits from the armour stacking bug, which is getting fixed. So while it might look on the surface like she’s going to be better, there’s other changes around her that might make it less of a deal than it looks.
Besides, I think Orisa’s previous minor perks were pretty solid anyway, right? IIRC, they were heat refund on crits, and 100 overhealth on popping Fortify. So my guess is that the perk changes are fairly neutral to her. Personally, I don’t think I would choose the new minor that gives her healing on ult useage and, if I was given the choice, would stick with the +100 overhealth on Fortify perk.