I agree with you. We have talented TEs and should utilize them more.
Throwing more to the TEs would open up the field a bit for the WRs, not to mention limiting the opposition defense from concentrating on run defense, which our opponents have had a tendency to do.
Although the offensive numbers this year are quite impressive, a diverse offense is even more difficult to prepare for and to stop. With so much talent on the offensive side of the ball this year, more effort should be made to spread the ball around more. It's a balance . . . for example, Ezekiel Elliott has been so effective running the ball that there is a good case to be made for continuing with what works, while at the same time trying to diversify the offense and make opposition defense preparation and execution more difficult.
One thing is certain, the offense has made tremendous progress over the season. The players and coaches deserve credit for that, especially with respect to the offensive line.
With that, I conclude my own armchair coaching contribution for the day, :)