When necessary then it will be. To do this, you need to do quite a bit of work for 2.2. 2.1 is already a very serious application and for 2.2 it is not very necessary to rush. Now there are more important tasks and bug fixes. In addition, it will be necessary to update the code base for PHP 7.2 and get rid of the hereditary code and compatibility with older versions. Everything needs to be reviewed all the proposals and some specific to implement. Yes, and the editor needs to be updated, but there are tasks and more importantly and there is no need to rush. The code base is already good, which only needs improvement or a census of certain points.