IRC is important because honestly nothing tops real time debates. Forum debates are nice, but are often drawn out and don't very often reach conclusions. I put a few people that didn't use IRC on the UU council in DPP and quickly regretted it. It slows down almost every part of the process when things have to take place solely on the forums. That isn't to say I won't put anyone who doesn't frequent IRC on the Senate. I'm much more likely to put someone who consistently posts in the megathreads on the Senate than someone who never posts in them, but is on IRC every day. It's simply a complete weighing of UU community involvement. IRC is simply a portion of that involvement.
Secondly, obviously the apparent bias against those that struggle with English is an unfortunate downside of requiring voter explanations. But that's a casualty we're going to have to deal with if we want the most in-depth process as possible. I apologize in advance to anyone this screws over.