I have the Intelloflo3 with relay board and no touch screen. It was cheaper to buy the relay board and pump separately, and its very easy to install. Its an expensive pump so every little bit of savings mattered to me. I don't miss the touchscreen at all if it matters. I have had zero wifi problems, and if wifi goes down, you can connect your phone directly to the pump via Bluetooth. TBH if my wifi is out, likely that means my power is out too so no pump anyway. There was minimal plumbing required for me since I replaced a 1.5hp Whisperflo, but you will have quite a bit I'm sure.
I have the SWG hooked to the lower amp relay. The flow switch produces chlorine even at the lowest setting, although I run the pump at 35 percent 24/7. The larger 16A relay would power my waterfall pump but I haven't wired it up and don't plan to as its not close by. I have considered replacing my RJ-30 with an IC-40 and automation panel to be able to completely control everything from my phone but it's really expensive. I might check out the Core from DSP. The VS running 24/7 at 35 percent uses about a third of the power of my old single speed.
DIY warranty is only one year parts only, so if I did it again, I would have used a card that gives extra warranty. Last time I checked, most replacement parts were in stock at Inyo, but that may have changed.