No.

New model notwithstanding, from day 1 it is likely to be the most reliable full size truck on the market. If you are not in a hurry, it will likely be even better in the next model year. Whether it’s the right decision for you depends on your personal situation, but I doubt you would regret getting one. 
FYI, I bought a 2014 Tundra new (refresh, not a full remodel) and loved it. 

The new tundra hasn't been out long. It also a twin turbo V6. The verdict is unclear on this vehicle. Wait and see what happens.

Why not get a 2021? They are reliable, and you know what you are getting as the model has been out a while. If you can find one for a fair price anyway. The 2022 may be okay, but it almost certainly will not last as long as the V8 model.