I received my new brewer yesterday. It has some fancy lighting choices which to me really add no value whatsoever. You have the option of 4 different colours for the light in the water reservoir - white, green, red, blue. There is also a night lite function where you can program that same light to turn on/off. You can also choose from a variety of different background colours for the screen display. As well you can choose between a digital time display or a analog clock. On the B70 I could save my favourite default brew size - this can't be done on the new model. All of these really have nothing to do with making coffee. I brewed a cup this morning and found that after it injects the blast of air at the end to prevent drips (just like in all the other models), it still did drip about 3 - 4 times so when the screen displays 'ready to drink' or whatever the message was, you need to leave the cup in place for a few more seconds if you don't want the drips. The carafe is plastic and according to comments on youtube, is not well insulated so by the time the brewing is done, the coffee will have cooled off. The time to heat the water and complete a brew cycle from the moment the unit is switched on seems to take longer than what it did on my B70 brewer. It also seems to be slightly noisier.
I don't know how you would disable the sensor as taking the machine apart does not seem to be very easy according to one guy on youtube and you will probably end up damaging the finish. I've attached a link for the magnet trick hack. There are many more vids - just search for 'keurig 2.0 hack magnet'.
Gary