I think there are a few models for anti-gunners to follow.
For one, you can look at what anti-abortion / pro-life advocate eventually did even though they were handed a defeat in Roe v Wade. They nibbled around the edges until in some states, getting an abortion is so wrapped in regulations and rules that they've put up tremendous hurdles and disincentives for abortion.
There is a lot that municipalties and states can do to severly limit gun rights - as in New Jersey, certain parts of California, New York City...
I don't think we've seen where the courts are going to remedy those situations. Maybe Kwong, et al v. Bloomberg et al could set a positive precedent. It could also go against us - in which case "excessive" amounts of paperwork, forms, fees, processes and proceedures, long wait times - could only be fixed with legislation.