Was that previously an ATT or Pac Bell vehicle? May have been run hard.
Yes, the transmissions are known to be a weak point, at least when the vans are overloaded or used hard. I bought a 2013 Connect a while back with only 5K miles. Now considering myself to be the "original" owner, I'm approaching 20K miles. My plan is to take very good care of the transmission.
I have acquired a spare transmission pan, and have had a drain plug welded into it. In the next few months, I will do a preventative transmission fluid and filter service, and install the new pan. Then do fluid changes every 20 or 25K miles.
Transmission cooler sounds like a good idea to explore.