Those E and F coils get pretty pricey.....
The only advantage to the narrow bandspread coils is if you're using your HRO as a receiver coupled with a transmitter. If you've only got an inch or at most two to tune a whole ham band when you're trying to receive a station, it gets harder to dial in because a millimeter off and you've lost your station.
As far as what's even going on, on 15m....I have no idea. I haven't been able to talk there till yesterday
