Well, the renaming of things would actually be useful. He understands that framing is important, and tries to give the discussions a frame that is advantageous to his ends.
Unfortunately, he just isn't overly successful / good at it. If you agree with him on the points, a better approach would be constructive criticism, i.e. thinking about ways of changing the framing of debates that might be more successful.
Reframing the debate can be useful - I actually agree with him wanting to use the term 'piecework subcontractor economy' rather than 'sharing economy' for example. That is replacing one term with certain connotations with another that is, at least in my view, more accurate. It's pushing people to use a descriptive term rather than a marketing term, and can add to a debate.
Wanting to call Uber 'Goober' or 'Guber' on the other hand, is just childish, and makes it hard to take anything else he says seriously.
Unfortunately, he just isn't overly successful / good at it. If you agree with him on the points, a better approach would be constructive criticism, i.e. thinking about ways of changing the framing of debates that might be more successful.