Message prompt "1 of us is still fatally wounded" at the end of battle?

[The Martian]

After defeating the last alien a prompt appeared with the following message:

Mission complete

1 of us is still fatally wounded

End Mission?

(Question 1)
What is the negative in successfully completing a mission while you still have wounded personnel?
(Do they just take longer to heal on the Geoscape or is there an additional penalty?)

(Question 2)
I don't remember seeing this before, is it a feature of OXCE?
(I'm going to feel really silly if this was present in classic X-Com and I've just forgotten about it.)

[Meridian]

1/ Heal longer. Yes. No.

2/ Yes.

[The Martian]

Very cool!

Thank you for the information.

[andre2]

If the injured dude is so far out that another guy with a medkit cant reach him in one turn, the game ends anyway the next turn. I only had the message 3 times so far.

But if it is like that, what is the point?
Once the guy was injured by the last alien and then killed the last alien. On the first part of a two part mission. I dont remember if he was healed in between. But in the 2nd part he was alright with the same injuries. I believe I just healed him on the elevator at the beginning of part two.

On a single part mission I could not notice any advantages/disadvantages of the choices you can make on that screen.

[Empiro]

You recover some HP for ever fatal wound you heal, so doing that leaves you with more HP, which shortens the amount of time to recover at base.

If you don't have anyone nearby to heal, yes you can just finish the mission right away.