Quite honestly I find it hard to pity the Corsairs for loosing some allies. As Tenacity said , the Outcasts are loosing some as well. Not to mention other factors. Actions, both ingame and in the forums have consequences. Alliances must be cultivated, the relationship between factions must be encouraged. Discovery isn't a static universe, you can't just sit around waiting for the almighty Igiss to decide what is changed. Now, from what I have seen, the Corsairs haven't done a measly thing to increase their ally list. They rob, they pillage and they find themselves in the right to do so. That hardly encourages alliances. I don't mean that as a disrespect for the Corsair players but more as an observation of Corsair RP. But if we indeed go on a trend of asking for alliances to be fabricated out of thin air , I humbly request for the Junkers to be allied to the Keepers. K? K.
Now, onto the subject at hand. This idea has popped up quite a number of times I believe and my answer continues to be the same: Yes. From the history of the Osiris itself it doesn't make much sense for the Corsairs to fly the exact same model as the Order. Staple some more armor on it, make a couple of cosmetic changes, or really , anything that would make it fit best with the Corsair shipline. Maybe make it heavier, that seems to be the general theme of the shipline anyways.
EDIT: Now that left me wonder just how a Corsair Osiris would look like. Damn you, creative brain, damn youuuuu!