The laggy performance is expected for 2-3 days after an update to index files and optimize object detection in photos. Large photo libraries may take a day or two more.
About Apple software updates - Apple Support
Apple does update the software quite frequently for bug fixes, but as usual there has been no date given for the next update.
Third party applications can only be updated by the developer if those are the ones you are experiencing problems with them not working properly. If you experience a problem with a third party app, then you should contact the developer.
If you want to let Apple know about any specific issue you are having with their software, you can do that here with the Feedback link. One of the options you can use is for a Bug Report.
Product Feedback - Apple