That damage from what it appears has a very small friction loss. Within the outside/inside unit I am sure there are far more restrictive areas, bet the king valves produce more friction loss due to restriction and turbulence.
Take a adjustable wrench move it up and down over the crimp and with taking baby steps it will round out. It won be perfect but it will be a lot better. It doesn't look that bad.
That will likely be fine, but if you are really worried about it you can try take an adjustable wrench (or flat-jawed pliers if you have them) to round it out a bit.