Maintenance for the week of November 18:
• PC/Mac: No maintenance – November 18
• ESO Store and Account System for maintenance – November 19, 9:00AM EST (14:00 UTC) - 6:00PM EST (23:00 UTC)
• PlayStation®: EU megaserver for maintenance – November 19, 23:00 UTC (6:00PM EST) - November 20, 17:00 UTC (12:00PM EST) https://forums.elderscrollsonline.com/en/discussion/668861
I can't say from personal experience but I've read other posts recently where players who have tested it have found after a recent'ish patch that magicka/stamina returns for heavy attacks are no longer a percentage based on your maximum. They are a set number.
Yes, it does restore magicka, the amount is determined by your character level. The amount caps at 212 magicka at VR1 for Destruction Staves. See Circuitous' first post on this thread for updated heavy attack info.
I think the 10% you got was from the discussion about Restro Staves which have a passive (Cycle of Life) that does up to 10% damage based on your health. Update 4 's patch notes said it removed that 10% damage increase, (but that didn't happen so it will happen on a future patch if it has not happened already).
It is the 10% damage increase that is being removed from Restro Staves, not the magicka return from either staff.
Ahh right! I wish they'd just put it in words instead of complicating it It's really annoying with the skills. They put all these odd words, and things that don't make sense. Really annoying xD Oh well it happens Thanks!~