It's acceptable but not preferable. Personally, especially when skating long distances, I like to push regular, then revert and push switch for a while, then go back to regular, and so on to not put too much stress on one particular push leg. I would say if you are getting footage only push switch if you have a really good one.
Edit: recently I had a turning point where my switch push got better because I made a point to do it more, put more weight on my switch front foot longer, make turns while pushing switch, and forcing myself to push switch up to switch and fakie tricks.