200e

I don't know how many of you have read this or are aware of its
existence but there's an entry for the 200e on Wikipedia. 
http://en.wikipedia.org/wiki/200e
A few shortcomings and work-arounds are mentioned which I'd like some
updates or clarifications on, if possible. I just thought it would be
worthwhile to get the latest data and to dispel any false notions that
may be derived from that page.  

Here are the two I'm most interested in hearing more about and they
concern the 261e:

1) The bad news is that it is not obvious how to get similarly
good-sounding results by routing the modulation oscillator output
signal into the "fm in" signal input of the 261e (or the 259e for that
matter). Instead of a pleasing FM tone, the sound gets really grainy
as soon as the knob related to the "fm in" input is moved beyond its
zero position. This is very unfortunate, because if this worked as
expected, one could build some complex, but controlled, FM operators.
I have found one work-around which suggests an error in design and/or
implementation: by attenuating the modulation output (which can be
accomplished by routing it through a 210e Control and Signal Router
attenuating the connection a few clicks below unity), results are more
in line with expectations. For now, absent any other information or
known work-arounds, the best way to do conventional and controlled FM
is to use the internal connections, which means that two-operator FM
synthesis is the order of the day.

2) Another source of confusion for me is why, when applying audio-rate
frequency modulation to the principal oscillator, the pitch appears to
go sharp or flat. I'd expect the pitch to remain stable and only the
timbre to change.

Thanks!