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I'm keeping this short.
The update wasn't mentioned at all in the post, not as "Ultimate Anime Summer", "Ultimate Anime Summer: New Beginnings", or "New Beginnings".
Albeit, unlike the previous three cases, the content for Regeneration/New Beginnings was already in our pack files for a while before official release. I'm not sure if that's what they had in mind for not including it in the maintenance notes, but they probably just wanted to make the update a surprise as they didn't announce it anywhere else either other than ominous logos of something coming who knows when.
My point was, saying only part of the update's name or saying its full name won't change what its full name is. I see no reason why this doesn't already prove that it is Ultimate Anime Summer: New Beginnings.