Have you tried the patch notes? lol
http://na.finalfantasyxiv.com/lodest...c43828a#battle

Well, I'll help:

Thaumaturge
Thunder -
Can now only be used by thaumaturge and black mage.
Blizzard II -
Potency has been reduced from 100 to 50, and the bind effect has been increased from 4 to 8 seconds. Can now be used by all Disciples of Magic.
* Only thaumaturge and black mage gain the effect of Umbral Ice.
Scathe -
Potency has been reduced from 120 to 100.

Black Mage
Freeze -
Potency has been increased from 20 to 100, and the casting time has been reduced from 3.5 to 3 seconds.
Slightly less relevant:
Motions and effects have been changed for the following:
Statuses
Greased Lightning I / Greased Lightning II / Greased Lightning III / Astral Fire I / Astral Fire II / Astral Fire III / Umbral Ice I / Umbral Ice II / Umbral ice III
Which means we'll get an orb per stack of Umbral Ice or Astral Fire since that was shown in a preview already. So up to 3 instead of two.

Also, it is believed they fixed getting a second reduced cast time spell off when transitioning from UI3 to AF3.
After looking at the video of Yoshi fighting EM Titan a few times and with a lot of pausing (lol), I can say this seems to be the case (though I'm still hoping it isn't...)
If anyone tells you something about mana ticks changing, don't believe them.
That is all.