I have had this problem for a few days now. And since no answer was posted in this thread, I thought id drop what fixed it for me.
I had experienced exactly what the OP did. Frequent disconnects during matches. My rig wasnt closed to being maxed out. Dropping graphics didnt work, nor did reinstalling the game, the integrity check, updating my any driver, a power cycle on my equipment. I followed every step I could from this forum and WG's tech support trouble shooter tips (up to fixing the ports, I couldn't figure that one out).
Overnight my router decided it wasn't going to cooperate with the game anymore. I changed my ethernet connect from the router directly into the modem, and bam! no more disconnects. Since my modem only has one output port I put in my splitter so that it goes from my modem to the splitter and from there to my desktop and router. In case anyone else has this issue, give this a try.
And for the record it happened before and after the patch that went live today