I have the 30.0 package as well with the Arris DG860 modem / router combo. I had the 30.0 package installed (not an upgrade) earlier this week.
I did everything I could on my end to try and resolve the issue (power cycle the modem, disable firewalls, etc.) still my upstream is less than optimal.
My connection has been iffy, more so my upstream than my downstream. I called support, they said they're going to send someone out here to check it out. I doubt it's something on my end if you're having similar issues as well.