ive been at AKA since late summer, the first thing i noticed was that 20 years of judo newaza means its really hard to adjust to new rules and trying to sub somebody who isnt fighitng like hell to get out of a "pin" really isnt easy.
so.. in a nutshell, here's the newaz philosophy in judo.
in judo.. everything comes from the pin. pins win matches just the same as throws, chokes or armocks. they are the easiest to transition to and turn people over with. until you reach 13 you are allowed to do nothing but pin in judo (at 13 you can choke, in HS you can armlock). people fight like all hell to get out of pins or not get into them. when they fight the pin that hard, they give up their back or their arms.
there are no hooks in judo, so if somebody gets past your guard, there is no cute little hook to keep that 25 second clock in check before you lose by ippon. you either get them in guard, half-guard, trianagle or have one hell of a turtle to avoid a pin.
constant progress. same as instanding. judo penalizes stalemates on the feet and stands them up on the ground. your initial entry into newaza better be damn fast and effective cause most refs will give you maybe 10 seconds to show something positive, then maybe 10 more for some more progress and then maybe 10 more to try and finish it off. at the most! so, if you are going to invest the energy to really attack in newaza, youd better have a lot in the tank left once you get stood back up.
there are no subs to the neck (ie, cranks), wrist, ankles, knees or shoulders in judo. you cannot put your hands in the face at all. you cannot choke somebody with a belt or lower lapel. you cannot put on a choke across somebody's jaw. you cannot bend their spine into an arch.