I agree. Hendra usually is lethal at the front and markis at the back. Hendra and butet would be crowding the front court area and nobody would cover the rear court.
Hendra in front and Kido in back side was created by their opponent. Like Luluk in front and Alvent in back side. I believe Hendra's smash is harder than Kido, more dangerous if he play in back side. Their opponents who prefer Kido in back because he is shorter. Then Hendra improved his netting skill and Kido improved in jump smash.