Unfortunately, we're limited to the existing slots for the foreseeable future.
hmmm too bad, waybe with the kemper2 then 
Here is a Feature Request for a "channel strip", if you want to add a "+1".
A compressor in the effect section does not make too much sens.
Try the compressor in the AMP module.
hmm i haven`t used that a lot, i`ll check it out thanks! ... but the thing is i can`t turn the compressor in the amp module off with the footswitch ... and that would be cool because sometimes i use a slightly distorted amp and then turn a distortion or fuzz pedal on and off with the footswitch, but then i want to have more control with the distorted sound so i add a eq and compressor at the same time just that it sits in same spot in the mix ... know what i mean? that`s why a channelstrip effect woulde be very cool ... or another added page for the somp effects with a parametric eq... 3 bands are often enough for me ...
The cool thing with amp Compressor is that it alters the clean portion of the distorted sound and isn't exaggerated even with more distorted sounds.
