We haven't tested the 8.5 Agent yet, however, the work-around has been working fine for our customers using Zero Clients + PCoIP.  We didn't see any mention of a fix in the Horizon View 2203 (8.5) Release Notes, so we stayed with the work-around until we see something official.

The only issue we have seen, with the supplied work-around, is when we have customers attempt to use Horizon Client (8.0-8.5 so far) + PCoIP. We had reports of primary and secondary monitor issues (diagonal lines, "ghosted" images) when using that combination. Right now we are running a separate desktop pool/s to support those customers.