To throw my 2 cents out there;
I think you've made the coin look better.
I don't think it would have graded EF+ even if it wasn't in need of your assistance. The details are not particular good. With the shillings I usually focus on the star and look for a real sharp one. This one looks flat. From that point alone, I would suggest that VF pre-cleaning woulda been all I'd have given it. (Trying to make you feel better about taking a cleaning agent to a coin!)