You can use stackexchange.com to filter by tag across all sites (searching across all the sites just goes to Google). I subscribe to the list of status-completed questions across all the meta sites and this gives a vast amount of noise and a small amount of signal showing changes that might impact this site.
(There was enough noise that I missed this particular question, although I certainly noticed when the spoiler text started being excluded from the RSS feeds, since it's just a plain exclude, not marked in any way - so questions read very oddly).
It doesn't show everything (e.g. anything that's developer initiated rather than user initiated), but it covers many more minor changes than the list of feature changes.
The way meta is handled is one of the most broken parts of StackExchange IMO. This is good, because it means it's likely to be fixed at some point.