I'm just going to post a quick reply because it's late for me, too, but I like the concept of multiple rule sets. A true Ringen tournament, it seems, would be best served with a variety of events, for example, the takedown rules you mentioned would be one "event," or if you're in training sessions, one drill, because it isolates a specific set of techniques for kampfringen that you would really want to be really, really good at. Another drill/event would be the pseudo-kampfringen idea, and another could event be wrestling with a back dagger (more a drill than anything else, I suppose).
Just a quick question on the ruleset you mentioned: are the chokes removed for safety reasons, or because they aren't really emphasized? And (as someone not nearly as versed as he'd like in Ringen), how many of these kinds of chokes were shown in the manuals?
I especially like your focus here on standing grappling. It never made sense to me to try to go to the ground, as a primary tactic at least, in what was effectively meant to be used as often as not as a weapon delivery system. Throw, then stab. Rolling around on your back seems a bit suicidal then--mind you, I mean if that's the tactical choice you're making, going for the ground game on purpose as your primary tactic. Not a bad idea to know how, I just don't want my reflexes conditioned to always shoot for someone's legs if there's a chance I'll be using this where the other guy has friends with swords and daggers.
More postage later. Must still work before I sleep....