Yeah but it's still OK with Corsair, as Corsair's trait doesn't specify Reavers. It's a maniple you can sub anything into and retain the maniple trait benefit no matter the titan class.
I think that was pretty early when they made them. Much more streamlined and the guys are quicker for the siege of Rhodax.
One of the Solaria ones was wrong with the Corsair maniple but that was before the FAQ I think. Guy subbed 3 warhounds instead of reavers (within the rules) but gave them all the ability to moonwalk like reavers per the maniple rules. New FAQ says units can be subbed, which was no problem, but they can’t get the rules specific to the class of Titan.
Ah egg on my face then good catch. That’s just odd how it was executed then when things like the Reaver/Warhound combo specifies that the Reaver gets a free shot then. Probably just oversight but I’ll defer to the RAW
The Corsair was worded to be that way to be really general, the Regia and Venators were the bonuses are more important were made more specific. The BYOL rules would let me sub in a Warlord with 4 Reavers in a Corsair Also Atarus (IIRC) could sub in another chassis and get the specifically worded titan's benefit but that's been nerfed.