I agree the gap has narrowed. I remember in the 1970's seeing jim Tebby beat Ivan Mauger at Wimbledon and preben rosenkilde defeat ole olsen at west ham. At the time those results made headline news, these days most riders of a decent standard can beat the top men every now and again!
the only people that can change speedway in this country are those that hold the purse strings. If the promoters don't want change, what can us fans do about it, apart from vote with our feet!