I've found that turning off the firewall is the way to allow the most uploads, not ideal by any means. Pushing the ip really decreases upload connections. Hopefully it will get better in version 3.

I have not played with the cache, the terminal, the process viewer, and have always installed updates right on top of the current installation. I disabled the ultrapeer capability, but still have had 3 unexpected quits over a 24 hour period. It is running with much greater stability in this version, although that may sound like a contradiction.
On the cable modem, I cut the bandwidth down to about 50%, and set uploads at 5, although I frequently see more than that uploading. That is a new bug, again hopefully fixed soon.

If I allow any more bandwidth, network usability for other activities degrades considerably.
Anyway, that is my experience.