@KegLand-com-au I agree with the conical bottom - perhaps some option of installing a hop stopper type arrangement? Or maybe two outlets with a drainage port in the middle and the pump higher to always mean you are drawing off clear wort.... Or all of the above with a hop stopper that fits into the conical shape, high pump outlet and centre drainage port to maximise volumes & efficiency. Having said all that I like how easy it is to clean the flat bottom element compared to the kettle style ones.
It would be great if the pump were capable of pumping the wort through the CFC as well. I had to retrofit a larger pump into my unit for this reason. Maybe the pump power control has merit in this case - 1 setting for mash with fine control on the ball valve and then full bore on the cooling setting.
Accurate volumes through the a sight glass like the current option would be nice assuming the manufacturing tolerances allow for it, otherwise blank polycarbonate would still be better than stainless steel if there are no other long-term drawbacks.
Maybe a sparge arm accessory? Does actually make any difference?