I would also have made a bigger point of Apple not having enough USB dongles to supply their 'new, modern' laptops. It's a pretty big complaint to level against the "so what, it's one dongle" apologists, if you can't get one in the first place.
While it's okay if not everyone at Apple is interested in the MacBook Pros, the people designing them have to be disheartened by the reactions. Decisions to put off this release for so long seems like it must have been a strategic one made outside of the group which probably wanted to ship a Skylake MacBook Pro a long time ago.
Imagine (over-)simplified analysis that showed customers keeping their machines for an average of three years, or four product generations that were each about three quarters long. If Apple changed the time between generations to six quarters, then they would have retooling costs for only two cohorts of customers rather than four, and it would also get economies of scale similar to having twice as many customers buying each release.
Now imagine that suitable Kaby Lake CPUs with Iris graphics turned out to much further off in the future than originally expected, and Apple ended up deciding they had to release a Skylake MacBook Pro rather than being able to skip the microarchitecture.
So they do, but it's later than it might have been, and there end up being some issues that make it seem like it was designed and released quickly rather than like it had been refined even more than usual. And, on top of it all, the difficult, but ultimately beneficial, transition to all USB-C everywhere ends up being needlessly antagonizing to customers due to a cheap decision not to toss free legacy adapters and free USB-C/Lighting cables in the box of every new MacBook Pro.