Well has anyone tried using the Corsev in an early rush strategy perhaps, taking over enemy ships early on might do wonders. As late game a single target ability like that doesen't work out so getting that implies getting it early, using the ability every time it is on cooldown, and amasing a small fleet of ships. If this works against militia that could of of interest as well. Think of it merely as an economic start by not having to build certain ships, if I take over 1 militia Cobalt thats 300 credits and 55 metal I do not have to spend.
Im not trying to say its a good ability as I don't have access to Beta(:c) but always try to look on what is positive about it instead of looking at the negative and amplifying it. Granted these ships are damaged but if you keep them safe im sure you can save alot of credits, metal, and crystals investing in boarding party.
Perhaps the Corsev is more useful for the rebels as they are the gather army, and blow shit up. So it gives them a more aggressive early game, while the loyalist have the Akkan. This is just me brainstorming I really have no idea.