I have been running YS motors for almost 20 years and this is the first one I have disliked. The reason is just exactly what you have just outlined- it takes a lot more work to start this motor. I understand that the game is to make the most power but one of the good things about the old YS fuel system is that the motor is so easy to handle. Get it wet, put on the glow and one backflip and gone. This DZ stuff is a PITA. I'm gonna take a look at the Saito 2.2 with the pressure system. I have a 300 with that fuel system and it works OK. Not like the YS but OK. Maybe YS will answer Saito's challenge with larger "sport" engine.
BTW, the Kavan starter works fine; been using one for years. You don't have to rewire it either. Just put in a bigger fuse and you are good to go.