I personally have no problems with Valk as an ult. I got a great suggestion on a previous thread that her primary target in Valk gets extra healing which I thought was a nice and elegant way to sneak in a little extra skill expression into its usage as you still have to target prioritise to get the most out of it, which was cool. Sometimes in Valk you’re just casually targeting any ally because you know everyone’s getting the same level of healing, so there’s less decision making there. Small change, but small changes are good as they improve the hero without making too drastic a change.
Here’s my rework if you’re interested. It’s more focused on fixing the general kit more than dealing with the ult: