Good points. I started with ClojureScript earlier this year and I agree with your article. But for me ClojureScript is still much better option than staying in JavaScript land. Performance will be solved over time with faster machines (I've purchased high-end iMac recently, so I don't feel such pain :-). Workflows for incremental compilation like Figwheel also help a lot. And I think there is a great promise that tooling will evolve quickly.
I'm the author of cljs-devtools. I think for development it is perfectly fine to use Chrome Canary. Also I would recommend you to check out this article: https://github.com/binaryage/cljs-devtools/wiki/Figwheel-REP....
My public projects so far:
https://github.com/binaryage/cljs-devtools
https://github.com/binaryage/chromex
https://github.com/darwin/plastic