I work in the plant that builds the Tundras so I know a lot about them and plus I just bought one a few months ago so I am going to be as honest as I can be about it. Overall the Tundra is a great truck but like all other vehicles it could have some improvements. But Toyota does a lot of things to there vehicles that the domestic companies do not do like Toyota puts sealer on the edge door seams to keep from rusting and spray pvc under the vehicle and in the wheels wells to reduce road noise and to prevent rust, sprays antichip along rocker panels to prevent rock chips. I think all of these extra little things add up and is what makes Toyotas good reputation.
Tailgate assist, design of exterior, comfortable seats, nice responsive engine, quiet cabin, lots of storage compartments, interior has lots of head and leg room, sharp turn radius, bright headlights
Radio antenna in windshield, little less plastic in interior, make front grille stainless steel instead of black plastic, make automatic headlights a standard, make oil filter easier to access, possibly improvement on ride comfort