I use knitr with LaTeX every day at work. While RStudio is state-of-the-art when editing the R chunks of the document or knitting the document, I've noticed that the syntax highlighting and autocompletion offered by other IDE's (like ShareLaTeX or the LaTeXTools plug-in for Sublime Text) make editing the prose, captions, citations, etc easier and more fun than doing it through RStudio.
I remember hearing back in April 2016 that some enhancements were planned later in the year. If I've overlooked some I apologise.