This type of question is tough to answer because it is based on "feel" which is different for each person. We must assume the dealer checked your steering tie rods when they did the alignment as well as noting condition of bushings etc.
I would say if you felt like the 2014 you drove was similar, then yours is probably normal or in other words, nothing is seriously wrong. Your truck being a 2008 it is likely it has has wear in the suspension that will loosen things up.
Tires can be a huge factor. If your tires are something other than the factory Michelins that might something to consider. Also tire pressure being low will give the feel you describe. With cooler weather it is easy for tires to get low to the point of affecting handling. One or more bad shocks can contribute also.
I have noticed that on certain roads that have become rutted, usually those that are used often by big heavy trucks, the RL and for that matter any car, will try to track in the ruts. This often causes the feel you describe. Try taking some different routes to see if your feel changes.
I would have the steering linkage checked from the column all the way down to the rack to check for loose connections. Can you move the steering wheel (truck running but parked) 0.5 to 1 inch without any front tire movement?
Lastly, it would not be appropriate to compare the RL to an Accord or Insight. Both are much smaller lighter vehicles and have lower center of gravity. For a truck the RL handles pretty well...but as a sports car...not so much.
I would say if you felt like the 2014 you drove was similar, then yours is probably normal or in other words, nothing is seriously wrong. Your truck being a 2008 it is likely it has has wear in the suspension that will loosen things up.
Tires can be a huge factor. If your tires are something other than the factory Michelins that might something to consider. Also tire pressure being low will give the feel you describe. With cooler weather it is easy for tires to get low to the point of affecting handling. One or more bad shocks can contribute also.
I have noticed that on certain roads that have become rutted, usually those that are used often by big heavy trucks, the RL and for that matter any car, will try to track in the ruts. This often causes the feel you describe. Try taking some different routes to see if your feel changes.
I would have the steering linkage checked from the column all the way down to the rack to check for loose connections. Can you move the steering wheel (truck running but parked) 0.5 to 1 inch without any front tire movement?
Lastly, it would not be appropriate to compare the RL to an Accord or Insight. Both are much smaller lighter vehicles and have lower center of gravity. For a truck the RL handles pretty well...but as a sports car...not so much.
