I have a similar question, have been on the fence between 2 pump and 1 pump solution for spa jets and pool/spa heating/circulation.
I initially had 1 pump, but wanted a few more jets, then went to 2 pumps, one being dedicated to the spa jets. Now I talked to a plumber who suggested the intellifloXF and using a diverter valve to put say 80% of the water to the spa jets and 20% through the filter/heater to maintain spa temp.
The next plumber I talked to thought that idea was ridiculous and I would not be happy with it and should go back to a dedicated 2 pump solution.
Is the single pump with diverter value going to annoy me if it's on a JVA? (automated) or will I regret not doing a 2 pump?