Is there any indication when Hotfix 6 for V 11.x is coming out

Are you looking for this fix? Listed in 11.6.0 HF6 release notes under title:

Cumulative fix details for BIG-IP v11.6.0 Hotfix 6 that are included in this release:

533566-1 : Support for View HTML5 client v3.5 shipped with VCS 6.2

Component: Access Policy Manager

Symptoms: The upcoming release of VMware Horizon View Connection Server 6.2 introduces a few changes to the View HTML5 client. This fix catches up with those changes to provide seamless support at APM side.

Conditions: BIG-IP APM configured as PCoIP proxy and set up against VMware VCS 6.2 with HTML5 client installed.

Impact: Launching View HTML5 client from APM webtop may not work properly.

Workaround:

Fix: Support for View HTML5 client v3.5 shipped with VCS 6.2