This was not a complaint btw, I simply thought I'd offer some feedback on something we ere seeing.
Sorry i was late to respond. We tested with only 4 send/receive pads, and it was happening even with only 1 active at that time. Having 4 running at the same time did not seem to make it "worse", the ups drops seemed the same 1 or 4. I was the only one on the server at one stage, and I was remotely sending to a remote Silo, and i was getting the UPS issue. We were running quite a few Mods.
The game for about 3-8 people was running fine and seemed not to have other UPS issues. We moved on with maps since then, but i will try to run a few more tests and report.