How exactly do you think REST is easier to debug and what alternatives are you comparing it to?
Once people start exhibiting excruciating pedantry in designing their APIs, I'll switch off somewhat.
It takes just a few clicks to generate complete set of requests from WSDL (set, as in "one request per each operation"). I think it's much better user experience than hand-crafting json to use with curl.
Many languages support auto generation of consumer and producer code based off of WSDLs.
And AFAIK, most languages that don't have the auto gen tools do have XPATH libraries for easily manipulating templated SOAP requests.