I hopped on the test server as soon as I heard about this. Tested Kaustra. I'm quite liking the enhanced duration of Tabula Rasa. I've yet to test Embrava, but I will shortly.
Pre-update, I tested with Cosmos/Minikin/Ultimate atmas, did 2861 initial damage to Licorices in Abyssea - Konschtat. I casted a few times in the 90 second window that I was able to. The damage was the same each time.
Post-update, I am now doing 4351 initial damage. Same atma, same gear. All tests were done on one target instead of multiple, so I haven't had a chance to test against multiple targets with Manifestation.
(Of course it won't beat Blizzard V (7166 damage wut?) but it's a very fun 'helix' spell that can be made AoE)
Personally, I'm happy with the buff to these thus far, and I'm more excited at things to possibly be on the way for Scholar... but I'd still like stuff I can use more often that is unique to SCH that's actually useful. I rarely use Adloquium or the enmity spells, but I know they've got their uses.