1. The raid starship has a primary role of clearing turrets in preparation for an assault.
2. The raid starship has a secondary role of fleet support, inflicting additional damage, but is trumped by the fleet line in this role because of their superior firepower and munitions boosting ability.
I disagree - the Raid Starships are particularly good at acting alone, and quickly, compared to the fleet starships which are not so good at that. All of the big stuff that fires at the Raid line has a penalty at this point (since most of that is what has reclamation immunity), which makes it so that the raid starship line can last a lot longer on its own, unsupported. They also have a significant bonus against force fields and heavy defense items (big weapons, etc), unlike other starships, which makes them ideal for (supported or not) taking out those sorts of high priority targets. The fleet starships are vastly superior when supported by a fleet, but the raid starships are better than anything else at getting in, killing a high priority target, and getting out.
1. It can also clear turrets, but switches to shell type ammo.
2. It functions far better as a fleet support unit because it inflicts damage, but also (significantly, giving a reason to use these over the fleet line) reclaims some units during battle.
This is conceptually inconsistent because the only purpose they share involves using a, supposedly, different weapon to perform the same task (1). So, my thinking is;
The stats of the leech starship are literally identical to the raid starship, if I recall, except slightly pumped up and with reclamation. And apparently with shell type ammo to be consistent with the other parasites, but that could be swapped to lasers to be consistent with its line. It's the exact same ship, just upgraded with reclamation and slightly higher stats -- splitting the lines doesn't make any sense. The Stealth one is the exact same ship again, just with cloaking and a bit more stats improvements over the leech.
My suggestion is therefore to split the raid starships out from the leech line, and to start a new raid line with different bonuses. I think this is a cleaner solution than trying to reconceptualize the raid starship because reclamation is such a significant ability, and the change in ammo type is conspicuous.
Well, bear in mind that all of the non-homogenous starship lines have really different styles; flagships are upgraded light starships, but then you get zenith starships which are like mini-forts. Then you get the spire, which is a huge cruiser-type thing. But each of those two lines do hold the same conceptual niche, in my opinion; the reclamation is a significant upgrade, but that just helps make it better at its job of solo raiding (since it "recruits" support as it goes). That's my thinking, anyway.