I've now tested the new dark cloak on pts for a bit and the results are disappointing.
Long story short it was only healing me for 808 tics at low health (take the crit heal with a grain of salt as I was in a full crit setup which increases it by a quite a bit)
I cannot understand why zos would change a skill to be so niche like this. I don't think anyone or at least very little people on live complain about how strong of a heal dark cloak is. The current version of it on pts makes it not worth a bar slot for pvp.
https://www.youtube.com/watch?v=n6dnsJaY7rc
Video proof from pts