The linked article also says the listed problems are generally not particularly common. We should note that the Honda 3.5 in the RL is also a direct injection engine with a system to shut down some cylinders during light load, so some of the problems mentioned in the linked article can also occur on the RL.
What I don't like about the new Colorado is that it weighs nearly 5,000 lbs empty! The RL is no featherweight, but the Colorado is a good 500 lbs heavier. For a "mid-sized" pickup?!? With a 5-foot bed and a tight back seat?
I don't much like that they stuck with a live axle on leaf springs, either. That's a dated, crude suspension that tends to bounce and dance badly on washboard roads. Several modern full-sized SUVs from both Ford and GM show that an IRS can handle a large trailer just fine, so a solid axle is not required to pull a trailer. That's just an excuse to avoid improving the rear suspension.
I do like the ground clearance and the available under-body cameras. Together, those help make the Colorado a decent off-road machine (if you want to abuse your new truck like that, anyway). The lift won't help the fuel mileage, though.