Hello @arjunsureh, sometime back I asked about the roadmap for Q2A 1.8 (you can check it here). It covers some of the features you have listed.
- Tags and User ajax search is necessary in core, since most people search for keywords in stead of typing the complete question.
- Ckeditor have some custom selection for the plugins needed in the toolbar, for which Scott said that it'll be updated. Check it here
For rest options I would also like to see what Scott has to say.