There are changes already published on the German forum. I do not know the names of the abilities in English and neither is there information about which abilities get replaced by the new ones, but here are the translations:

Water Main:

Poison mystery cooldown 3->2. Sharkbomb loses crit buff, but instead depletes the enemy's chakra. The cooldown reduction passive additionally increases crit by 5%. The last passive gets replaced by a 40% chance to dodge 2 attacks per round.

Blitz Main:

Chidori Blade damage is increased by 50% if the enemy has no chakra. Iaido costs no chakra and has no cooldown if you have 70 or more chakra. Heart flux additionally increases crit by 1% per chakra point after 20 chakra.

Wind Main:

Hurricane mystery's cooldown gets decreased by 1 if you have at least two clones.

Fire Main:

Sealing jutsu ignores immunity and gets its cooldown decreased by 1 if the clone is alive. Secret of the Red Lotus last for 5 rounds now (instead of 3). Clone Jutsu lets you dodge one mystery per round with a high chance (I do not know what is written there, it's either the clone or the main himself, I assume the main). The chakra+life recovery passive has a 40% chance to restore 40 chakra instead of 20. The tagging passive gets replaced (I assume) by a passive which decreases the ninjutsu of 3 ninjas by 8% before the first action every round. Unparalleled gets replaced (I assume) by a passive which removes all debuffs and increases your ninjutsu by 20% before the first action every round.

Earth Main:

Interruption mystery's cooldown is decreased by one if you have a shield. Then the passive where you immobilize someone if you have a shield additionally steals 20 chakra. Lastly Guidance is replaced by a male-version of Flower Guard.