I suspect the reasons are valid. There's no reason for not releasing this time other than work loads. Truthfully the delays were probably caused by an employee vacation along with work taking place on a new design carb and handling old 115 issues. That's enough to set time factors back a bit.

If it was me, at least this time, I would just sit back and wait a bit for the release. I'm confident it's going to happen, unlike the 55.