I’ve wanted this for some time. I made a suggestion about making a Song Follow toggle for the Pattern Sequencer, much like the Pattern Follow in in the Pattern Editor (but got hijacked by some ASIO talk). This would solve a lot, especially if you could execute the same actions with mouse or midi as well:
http://www.renoise.com/board/index.php?sho…t=0&p=53580
And for the mutes; I’d like to be able to assign them to other keys or midi (inc automation to solve your request 
).
…and yes! Quantize options for mutes would rock! From 1 full pattern to row, or even tick level (Same goes for everything else. I want quantization for the rhythmically handicapped!!! 
)