There could be an option to toggle between first and third-person viewpoints.
Thing is, this being an online game, we don't know if it'll be PvP style where players are both aliens and marines, or if it'll be a standardized MMO PvE setup. Or a mix. We don't even know what the level design will be like, which plays an important part on choosing between a FPC or TPC viewpoint. Claustrophobic levels tend to wig out TPCs as seen in game history. And this being Aliens, if they do it right, should have a lot of tightly enclosed areas and focus on that type of atmosphere. Another important detail is we don't know if it'll be open world with transportation or match based tiny level junk like Cawwadooty (Again level design being key here.). If it does have open world segments, it would make sense to have the Option To Switch in a PvE overworld.
If it has PvP, I would rather first person as there's a plethora of ways to cheap-skate with a TPC, FPC allows for more skilled players to flourish.
If it's PvE only, I'm fine with option.
If it's PvE with PvP Zones, then I hope the zones will be locked to one camera view be it a TPC or FPC so that those engaged are in a level viewpoint.
None of which is hard to pull off. But overall options are nice, and if it will be optional I hope the to a FPC comes with a proper FOV Slider so people with various site ranges can avoid migraines. Only reason being it's Aliens, and I want that full immersion of "Oh shit I'm gonna be a sandwich!".
Why do the tags say Android and iOS? This is meant to be on Console