Maintenance for the week of March 9:
• NA megaservers for patch maintenance – March 9, 4:00AM EDT (8:00 UTC) - 12:00PM EDT (16:00 UTC)
• EU megaservers for patch maintenance – March 9, 8:00 UTC (4:00AM EDT) - 16:00 UTC (12:00PM EDT)
• ESO Store and Account System for maintenance – March 11, 9:00AM EDT (13:00 UTC) - 1:00PM EDT (17:00 UTC)
There aren't any notes to read. The information comes from a ZoS Twitch show, PAX East, I think, about 2 hours long. These are ideas ZoS is considering. In particular, it appears ZoS will be addressing long-term complaints about certain skills in Update 22: Snipe, Steel Tornado, and a couple others.
We will know more when Update 22 is released on PTS in mid-April. At this point, these changes are speculative and subject to alteration, but some form of adjustment is coming.