I have a similar setup for VR, 3xMFD+UFC, it works great, takes a little time to build up the muscle memory, but within a few hours it'll feel quite natural for you. Your setup looks great, I made one of the UFCs mentioned elsewhere in this thread, you will definitely love that upgrade when you do it.

Tip: get some bump dot stickers and place them strategically on your MFDs/UFC. I put big dots on the center button on all 4 sides of my MFDs so I can quicklytell which is the center button, and then small dots on button 1 and 5 on each side. Makes it quick and easy to tell which MFD button your finger is on. something like this: https://www.amazon.com/Mixed-Bump-Dots-Sizes-Colors/dp/B00II5TM6W/ref=sr_1_2?keywords=tactile+stickers&qid=1557502249&s=gateway&sr=8-2