Hello,
i did some initial performance-comparisons between the current version of the game and the unfinished reworked one (which will be a *free patch* for this version), here are the results:
The current version is on the left, and the unfinished reworked one is on the right.
As you can see in the top left corner, the Framerate is 78% higher [52 -> 93]

But it gets even better than that, in this example the Framerate is 109% higher [43 -> 90]

So, we have a performance improvement up to 2x or more on the following hardware:
CPU: Ryzen 1700X (no Overclock)
GPU: GTX 1070 Ti (no Overclock)
RAM: 16GB DDR4 2400
That said, performance increases can vary from system to system, but it should run better in general. ("Overkill" Settings shouldnt be run on minimum requirements-hardware anyway.)
That aside, the game will use the Menu from "ReThink 2", since it is based on the technical foundation of it.
The Menu still doesnt look "AAA"-Quality, but its a bit better than the current one:



Please keep in mind that the Menu has not been adapted to this game yet, and therefore is using the wrong images, etc. (Will of course be changed)
PS: Yes, i am aware that the grass color is "off" in the screenshot, its fixed already.