Yes I know software release practices, believe me But this is such an insignifcant upgrade for $69 IMO, and so soon.
I am up-to-date on 2 thanks, but that has no bearing.
It is fairly standard to skip alternate yearly upgrades and that's great you save money. If the upgrade contains anything that is of interest to you then that is great but it costs you money :-)
The point is you can't really lose :-)
For me the improvements in local edits having a layer opacity, being able to have a list of local edits, able to invert masks is something I wanted, great for me, not so much for you :-)
With local edits you often have several adjustments combined, setting the initial layer opacity to 70% allows you to quickly make adjustments and then vary the intensity of those adjustments both up and down. This is how I work in C1Pro and I find it very effective. Layers with opacity adjustment and layer management is becoming a "must" for my raw editor, but it is all personal choice. YMOV :-)
Ian