Just from my prospective, I'm not even sure what else Uconnect offers at additional costs other than Serius, an entertainment system and Navigation.
We had navigation on both our Mountineer and Avalanche, it was on a CD and was active from the day we bought the vehicles. They pestered us to buy new CD's every year (around $150), but we never did and we never had to pay anything to keep it active. I thought that navigation was a one-time setup cost with our Pacifica, but for us, that setup fee isn't worth it when we can buy a stand-alone system for a fraction of that, but even then, I've got Google Maps if I need help finding my way.
As far as satellite radio goes, again, both those vehicles had a free trial period, and they also pestered us to renew (at a cost), but we rarely even turn on our free over the air stations, so subscribing to Serius would be a waste for us. I'm guessing that we'll get the same bombardment of letters and email after our trial period is over, just like we're being bombarded for not buying the Mopar extended warranty.
And for the entertainment system, I made sure we didn't have one when we bought our Pacifica. We had one in the Avalanche and used it just once in the nine years we owned it, It seems that our grandson ran the battery down using it while we were out in the desert target shooting. Our 2014 T&C had one as well, and we never even tested it to see if it worked.
I guess I have to ask, what else does Uconnect offer as an option, and at what price?