I run one on my KTM 690. It's a great idea and well executed. There are always some concerns and "mis-information" about them.
Problem 2: Not a problem. There is a slave cylinder where clutch engagement is adjusted. Bottom out the adjustment and you're back to a normal clutch. I ride my KTM on extended trips in the middle of nowhere, being able to roll start is a BIG deal to me.
Folks also think they'll lose engine braking, not true. Since the RPM's are up when you downshift engine braking is the same as always.
As far as keeping the bike upright when chugging along at stop lights in town. Engagement is SO SMOOTH (and adjustable) that it's better than most riders. I've been riding for decades, I would swear I am a master of feathering the clutch. I find in rough, steep, loose, rocky terrain the Rekluse is definitely better than I am.
I have not found a downside on that bike.