R integration would allow the user to include R code in their Writer document in the same way as one can do today with the ‘.Rmd’ format (R+markdown)and the knitr tool or ‘.Snw’ format (LaTeX + R) and the Sweave tool. The R code could be placed in a similar way inside a ‘chunk’ as in the aforementioned tools. When you run the chunk you get the figure or table. You can re run the chunk when you want to update the figure or table.
You need volunteers to implement it. A user forum is not the right place to find developers. For feature request use https://bugs.documentfoundation.org/.
You can work in R with Markdown (RStudio integrates the two nicely), and then output to ODT using Pandoc. See http://nicercode.github.io/guides/reports/