Hi there,
While I have not used the Opti Coat and used GTechniq C1 and EXO v2 on top of it, based from experience it does little to no protection against fine scratches as to my old set up of Power Lock and Glanz Wax.
The water beading does glide very well, comparable to AutoGlym HD Wax
As for protecting the paint work, the proper way of being swirl free is to keep the paint work clean and use proper washing techniques