Whirlpool seems to be getting away from the name Duet. It will be interesting to see if the new models ill have Duet or not. Thus far, all Maytag front loaders have Maxima. But again, after new models are announced, one will see.
I know you're concerned about cycle length. AS I've suggested before, if you know you're going to be doing a load that is going to be longer due to high heat such as Sanitary or Allergiene, use the delay wash and have it start in the middle of the night and have it timed to end about the time you will be waking up. You end up dealing with some pretty dirty laundry. Even for warm wash, activate the steam to make sure temperature is good and warm. Temperatures are dumbed down. For lighter soiled things, I've been using my normal cycle for some things as I'm having to be concerned about water usage. I always select hot for Normal as it uses relatively smaller amount of water. It typically does a 10-15 minute wash phase on normal soil. But by the end of the wash phase, it's pretty tepid inside. What engages the heater to supplement and maintain temps is heavier soil levels and this allows for longer time for water to heat. Also, engage the steam option. With temps dumbed down, don't be afraid to select hot, especially for cycles that don't have steam as an option. The mass of the load has a big negative impact on incoming water temperature. And temp can drop quickly without the heater. Some loads that may be fine, but on your dirtier loads, that may not help with thorough effective cleaning.