Maybe, for a start, airlines should consider removing ridiculously low weight limits for carry on luggage. In EK economy it is 7 kg, if I recall correctly -- which I have reached once I put my shaver into my perfectly sized trolley. For the same bag in business class the weight limit is 14 kg, so it cannot be any safety-related reason for keeping the limit so low in economy class.

Airlines should just become practical, enforce the current size limit on cabin luggage, and allow weight to be "reasonable" (max. ~15-17kg).