Hey @wjwwood,
Thank you very much for the kind words. We decided to pause our work on the PR for now specifically because of the points mentioned in your post.
The way we implemented the static executor atm gets the job done, but it would be even better if we could write an executor that captures multiple improvements at the same time. We are looking forward to the rclcpp changes planned for the Foxy release.
In the meantime we’ve separated the static_executor functionality from rclcpp and have written it as a separate library as requested by some users.
The Dashing and Eloquent versions can be found here:
To use the static_executor, please look at the README. By default the original executor will be used, you have to make changes to the package.xml CMakeLists.txt and your source code to actually use the static_executor.
We hope this separate library version can help some people out, while we all wait for the even more awesome executor that is planned for Foxy! 
