2. The grill does not come back to the set temperature after the lid is opened and closed to place the meat. I start it, close the lid, set the temp (startup procedure has changed to this according to Traeger service tech) and after 15 or 20 minutes it is not at the set temp yet...in fact it is declining. Well I need to cook on it and cannot wait forever so I open the lid quickly, throw the meat on, and close the lid quickly.

You are worried about flare-ups: When grilling fatty types of meat on a propane grill, you run the risk of having flare-ups, where the flame gets too high and too hot, burning the meat. You have to keep a close eye on the propane grill to guard against them. But with the Traeger grilling system, the even distribution of the heat and the indirect heating system prevent this problem.
With 341 square inches of cooking space and a digital control board that sets the temperature from 180 to 500 degrees, you’ll be cooking whole meals in this grill, even though it’s the smallest model that Pit Boss makes. It will hold up to a dozen burgers for parties, or a chicken and vegetables for the family dinner. When cooking is done, the porcelain coated grill grates are easy to clean.