I also went to the last Harrogate show and the first Doncaster show.
To say one show was better than the other in just that open context isnt really correct. There are quite a few different reasons that people wish to attend the shows. What are they going for? In no order:
Model Steam engines, traction engines, locos, stationary engines etc, New machinery and equipment. New and used tooling, new technolgy items, raw materials, fittings, fixings, kits, castings etc. Club exhibitions, information, meet builders, examine finishing of item and the list goes on and is exhaustive.
What makes it "better" over another show is how much is there which relates to those particular interests of the visitor.
To someone really looking at comparing new machinery equipment, tooling etc then Warco would be sorely missed and the show may well be deemed not as good.
To somebody going for say, the model locos then it likely wont make a difference or may be a tad better if more club exhibits take their place.