If earths orbit became more eccentric how would this affect the observation of the sun?

Answer 1

It wouldn't knock us off our feet, unless it was a lot faster.

If the Earth rotated faster, then it would probably mess up our orbit, and we would slowly spin into another heavenly body in space.

Answer 2

If earth's orbit became more eccentric, that event would lead directly to the total cessation of all intelligent observation of the sun, since it would render the surface of the earth uninhabitable by human life.