So from the stuff datamined a while back (im assuming im allowed to talk about datamines), tank blu is getting a skill that boosts max hp, a cover, an aoe mitigation tool, and some kind of mitigation from the bee enemy, and hopefully with the tank buff icon theyre getting they'll gain access to the tank role skills.
as for healer blu, looks like theyre just getting pom cure, and exuviate as basic heals then white wind as the big one.
Also if the sophia skill isnt cintamani ill be very surprised