..Having owned, towed a vehicle with a Remco lube pump, and knowing what I now know.....Kind of a tough decision, picking which of the two is the lesser evil.
Bad thing about the lube pump: If it fails or leaks, there is potential for a LOT of damage to be done to the transmission very quickly. In fairness to the Remco pump, Remco's monitor panel and pressure sensor they use (when installed correctly) reduces that risk considerably, but the risk is still there. If a hose springs a leak, for example...Yes, the monitor panel would let you know, but if a hose springs a 'geyser' leak like ours did once in the driveway...I'm not sure if that happened on the highway that you could get the pump shut off and pulled over safely before the transmission would have sustained some expensive damage.
Based on what I've read about the driveshaft disconnect and the issues some folks have with them, the good thing is there's not quite as much damage potential there. There is, however, a lot more overall 'PITA' in everyday use, in having to engage and dis-engage it, and the maintenance (lubbing, cleaning) it requires.
On a brand new vehicle like is the case here, and its too late to get one thats flat towable without one of these devices....I think I'd opt for the driveshaft disconnect as the 'lesser evil', just out of fear for what a transmission repair on a new one like that could cost.