ch200 is entirely voluntary.. you *have* to tune to it. There are still "rules" for ch200... just as there were for ch1.
Ch1 was always a default (and still is). One had to "detune" it. Hence, many noobs and over-the-shoulder viewers would be exposed to, well, you know how ch1 can be and wouldn't necessarily know *how* to detune it.
In the MA ch1 is full of nothing but 's by using some special dot command which send a to the player you input. That's the *only* thing on Ch1 in the MA.
i'm all for making ch1 and 200 in CT similar to the MA. and you can always lobby fellow CTers (or MAers for that matter) to make, say, ch 210 for tea-time Stuart Smalley chat.