Ya know, a lot of these suspected issues could be solved a whole lot easier than rejiggering the entire radio system.
Interference issues:
A - Require all new radios built or imported into the country to meet higher technical specs. That might mean FCC needs to get into the testing business, or have their own third party test labs.
Of course that'll drive up costs a bit, and the great unwashed masses will be upset that they can no longer buy a Cheap Chinese Radio off Amazon for $19.00 that runs 10 watts, transmit on VHF and UHF, have a built in flashlight and mosquito repeller, and are disposable (because I don't want to risk my $100 radio…)
B - All repeater owners, regardless of radio service, will be required to actually align their systems annually. Receiver frequency must be within 300Hz of assigned frequency.
C - Any person caught in possession of a "golden screwdriver" without also owning a calibrated service monitor will be hanged by the neck until dead, then fined $50.
Range issues:
Require radios to meet specific and stringent receiver sensitivity and selectivity values.
Again, that'll mean Cheap Chinese Radios will no longer be $19 for a pack of 10, (might only get 9 in the pack). FRS radios will need to spend more than 30 seconds being aligned at the factory. Cute 1.5 inch tall antennas will be out. Consumers might be stuck with "huge and ugly" 6 inch tall antennas (gasp!!!!, the horrors!) For CB radio, users might actually need to use a resonate antenna and learn about ground planes. CB radio installers will be required to prove they know how to spell "SWR". Anyone asking for a "low profile mag mount CB antenna because it might not clear the garage, and I don't want to drill a hole in my 30 year old rusted out Toyota" will be put in jail with nothing to eat but bread and water for 60 days.
User issues:
Radio users would be required to understand that radio is not "magic" and no matter what their cell phone can do, your FRS radio is not going to talk to your friend 5 states away.
Ham radio operators:
Hams would not be permitted to insist that anyone who wants to use a radio "should just get their ham license". Any ham caught in the act of doing this will have their $19 radio that is "better than a Motorola" confiscated for 60 days.
Death of the hobby:
Any hobbyist caught uttering these words, either in person or online will be sent to the cooler for 30 days with Colonel Hogan.
Reading the rules:
Radio users, especially hams, will be required to read and comprehend the FCC rules that apply to the radio service they are using. Amateur radio operators will be required to read Part 97, Part 2 and Part 15 annually and sign a statement saying they understand that their amateur radio license does not give them free reign of all spectrum from DC to Daylight, including all public safety frequencies even though "they are practically first responders".
Blinky lights:
Any hobbyist caught with any color strobe, rotating beacon or other emergency light intended to impact traffic flow in any way will be required to listen to every single Kenny G album ever recorded. Twice. Earplugs will not be permitted.
Any hobbyist caught with an orange vest, name tag with your call sign, or any item resembling a badge of a duly sworn officer of the law, will be required to attend no less than 2 weeks of psychiatric evaluation and retraining.
OK, so I went a little far there, but the first couple would solve a lot of these issues.