Ok, so Rebels got 3 new ships, Titan, Corvette and Capital.
The new capital ship for advent is quite alright I think, the first 2 abilities together reduce some enemy armor and do good area damage, also the ship itself hasn't as bad damage as the tec one ^^. And, big bonus, it looks like a whale .
The corvettes debuff is interesting, though it may be bugged, because I've never seen an enemy ship get it yet. Only thing I would change if I could is, that the HP-Shield balance should be shifted more towards shield.
Now for (my) the problem ship:
The Advent Rebel Titan is quite weak at the moment. His 2 best abilities (imo) are passives, you cant use up his antimatter at all with the remaining 2 abilities (at least I couldnt), and due to 2 passive abilites in upper row, the passive bonus to antimatter regen and ability cooldown is more or less obsolete (though that leaves you the points to spend somewhere else). Still it might be worth to think about modifying that passive ability, like making it increase the duration of the passive buffs instead of reducing ability cooldown.
The Titan is lacking firepower compared to the TEC rebel titan(well since the update for the titan at least), except if you are really losing alot of ships, then it surely gets stronger. But actually you are losing the ships only because the titan is relatively weak.
The heal ability is... strange. The autotarget is random (?) (manually I would always go for the guardian cruiser, as it has most shields), but that sacrificing really uses up quite alot of resources. I'm aso never using it, before the titan is out of shields, as you would lose the hp regen if you did. Titan isn't out of shields alot, so it's not viable for use very often. Also leveling the ability only reduces antimatter cost (no problem anyway), cooldown and range. I think it should more likely be increasing the amount of healing received, but not lower cooldown therefore, maybe not even antimatter cost (well it would actually still make the ability cheaper in terms of resource cost). So, due to the things told, more than 1 point in the ability doesn't seem useful at all to me.
Maybe it is intended to use the ability on resurrected destroyed hostile ships(through the tech, but which aren't appearing at the moment).
But best thing last, if your titan ever happens to die and go into the invulnerable wreak havoc state, the ability gets totally pointless, leaving the titan with only 1! ability. (even the one buffing the damage is more or less stupid then, because the ultimate bonus boosts antimatter regen and ability cooldown, so the main damage comes from ability spam then, and that doesn't seem to be boosted by the passive damage buff.)
The only thing shining is the damage ability, it has quite a large area of effect and can really kill alot of ships.
So, Advent Rebel Titan needs some love please .