St Pauli Success on the pitch/entertaining football would bring more back, and improve the atmosphere, but personally though I'm not sure I would for the reasons Mags gives.
There is a problem with football generally though. It's too expensive for what it is. As a result the young male teenage fan base will shrink in most clubs year in year out. When you consider all the other entertainment out there for teens, most of it free, or very cheap, and if not, easily obtainable illegally for free with zero chance of getting caught, then shelling out the cost of travel too and entry to a match turns off the young.
tbf isnt it a tenner a game for up to 24 year olds and 100 pound for a season ticket for teens
that's not massively restrictive