Cool, posting here seems to have positive respons on the support team
Anyway, just got a mail support and noticed the issue internally also.
In some jobs an old vcenter seems to be still referenced (is has been deleted for 6 months). No actual vm's were pointing to it anymore but for some reason after 9.5 update the jobs start looking for the legacy vcenter server again.
Cloning and re-adding the vm's didn't help so we created new jobs from scratch and now they instantly run ok.
Ps. Not seeing change in speed "yet" but performance was ok is 9.0 anyway, seeing around 300-400MB/s when backuping, hope restoring will be better... will do some tests tomorrow