Nice summary, at a glance you appear to broadly agree with the Professor. I have a philosophically different attitude to the "consultation" process but all the rest is the sort of things where values will vary differently depending on perspective, especially the already mentioned 4.2. If indeed the tax is retrospective, blame a legal system that allows this to happen. More civilised countries respect the principle nulla poena sine lege.
I am not really sure about your assessment of the impact of the 30 to 28% reduction and the 9 to 12% increase on small businesses, IMHO it is way overstated. Incidentally, inc. does not mean big. Ask your dentist, chances are the practice is incorporated even if it is a one man band.