Correct theory Andy....the key here is that you tend to attract the 'current day' spectator (i.e. Mum, Dad and 2.4 children etc...) with good quality, comfortable facilities, backed up by good quality entertainment.
Whilst the stadium stock in the UK continues to crumble, with Promoters having no ability to change the situation, due to their ownership status, these types of spectator cannot be targeted....we have data here at work which even hints at that fact.
I am a traditional football and speedway spectator, and I, like a number of those similar to myself, prefer the feel of an archaic stadium with the associated history, feel, smell and atmosphere, but out-of-town mixed-use bowls with no soul are the future...I am afraid that is just fact.
IMHO, once you start improving the facilities to this point, you can better attract the next generation of fan, bulk up the attendance figures and filter the increased revenue to improve the facilities further, and expand the offer to different user groups.
I do however feel that the sport could benefit from running on one or two fixed days per week only, reduced admission fees, and better promotion from the BSPA as a whole.