Voice sync over HDMI
EPG issues
DMX channels on HD
etc.
I count 1 - Voice sync....... the other 2 are features that have not been rolled out. You can't call a missing feature a "major issue" or even an "issue" for that matter. When you buy a BABY-PVR you know that it doesn't have this - but may be rolled out in future.
If they said it had it when you buy it and you plug it in and it doesn't - then by all means - label that an issue.