Great review, thanks for sharing.
I think you raise some interesting points, in particular one I've looked at, and that's a lower stroke rate in choppy water. Personally I much prefer to keep my stroke rate up in the chop, and in doing so I use a small blade size. I hear many guys pushing use of a bigger blade in the chop, saying that the lower stroke rate makes them feel more solid. I find the opposite, so it's good to see someone else with a similar theory.
I would suggest that you don't try and shorten your stroke out the front to get your stroke rate up though. No matter what rate you are operating at, a strong catch is the name of the game. If you focus too much on getting your stroke rate to a set target, then the first thing to suffer is normally catch and rotation, and we revert to using our arms, rather than just working harder with the legs and body. Quality strokes should be the aim.
I think having live data like stroke rate is fantastic in evaluating your performance, as well as equipment. It's a constant you can measure all others against. It would be great if you could comment in a few months about how your paddling has progressed. Stroke rate is so new to those of us not in kayak programs, and it is very much an untapped resource for surfski paddlers. I'd also love to hear if you adjust your paddle length, and indeed size, as a result of the new knowledge at hand.