Toyota does not manufacture a "bare bones" Sienna anymore. The $35k LE comes with all of the power equipment and a full suite of safety features. Moving up a step from an LE is a LOT more money ($5k more) and doesn't really get you very much for your money.
I finally got around to driving the new Sienna Hybrid. I was a little sceptical about giving up the V/6, thinking that it wouldn't be powerful enough. I was wrong, it actually accelerates better than I thought it would. Accelerating away from a stop is actually better than my V/6. The instant torque supplied by the electric motors make a big difference here. The fuel mileage is phenomenal, given how big and roomy it is, nothing else compares.