Without the atmosphere, everything would be brighter and clearer, but only Andromeda would be significantly closer. Even though there are galaxies just about anywhere you point a telescope, with the naked eye you would probably pick out Andromeda, The Milky Way and the Mageleic Clouds. I doubt you would be able to see much else.

My brain hurts now ... Thankyou !

Did you know that Andromedia used to be thought of as a much larger galaxy but now it is thought to be approximately the same size as our galaxy. The 2 galaxies will merge in about 4 billion years.

I think it would be nearly black. There would be a scattering of star-like galaxies - more than we see from earth because there would be no light pollution save only the lights of our spaceship, or atmosphere. The eye is sensitive enough to detect a single photon and cosmic rays can also trigger the light-sensitive cells in our retina, so we would probably also experience tiny, evanescent flashes.

Most likely if you were in between the two galaxies you would see the galaxies as small clusters or pinpoints of light possibly resembling a star. Much like how Andromeda looks. The farthest star we can see unaided is about 16,000 light years away and the two galaxies are about 2.5 million light years away. Obviously a Galaxy is much brighter than a star, but the distance is still vast. So my guess would be a lot of darkness and a few sections of clustered light.