+1 for this, I had to write a small script to "manually" add a lot of subdomains that where handled on wf with a wildcard and it's a really clumsy and temporary solution.
Also, the let's encrypt implementation on Opalstack is so great and it's a shame we can use it for this as well (I've read in another topic that once wildcards are supported the LE will automatically work for * as well)!