I can only assume you believe the town and county of Northampton doesn't like football?
Well being ts our national sport, a successful Cobblers playing in a stadium that gives some civic pride that features all the facilities known to attract football fans, playing competitively in league 1 against all our local rivals and big attractive clubs that drop into L1 on regular basis, would so very easily give us 50% growth in a lot shorter time.
I have a lot of mates (ah football fwend) who like football and support a range of premier league teams! Most have been on the glory days to Wembley and asked about tickets when we get the big cup games etc but they have no interest in coming on a weekly basis and its nothing to do with the ground. Its the 'sh1t' level of football! A few have been to sixfields on the odd occasion and to paraphrase they see Sixfields as a 'great little stadium'. Now I dont agree with that but its because they are comparing it to premier league grounds and they see it as 'cute'.
My point is there is a fairly large group of people I know that dont attend because of the level of football and not the stadium. They wont suddenly come if we have a new east stand or terracing, they will come when we climb the leagues and get some decent football. Thats where the focus should be, not build it and they will come.