We've found no trouble with rinsing in our Miele - we generally use the "Water Plus" option on the Cotton's cycle with a 1/2 dosage of detergent, since frothing is an issue in some instances, even with He detergents. The longer cycle, plus the intermediate temperatures ensure good rinsing. High interim spins also assist. We don't over load the machine either, generally 1/2 - 3/4 full on any given cycle (Each cycle has different amount of clothing it can take). 

Personally, I use the Minimum Iron, Delicates and Dark Garments/Denim program, and find (even on Delicates with no interim spin) the final water being pumped out for the spin is clear. There is generally no odour from the clothes, unless a strong detergent or Softener is used. 

These experiences may or may not be typical with our Miele W5741, although I suppose usage habits (Loading, Detergent choices, Temperature selection, Spin-speeds) all factor in. You may prefer really loading up, in which case, you may have issues. I suppose your detergent may have something to do with, as some rinse better than others, even though "soap is just soap" (I know I'll be hammered for that). But its interesting to note your experiences and contrast them to others.

By the way, our model has the separate options for "Rinse/Spin" and "Spin only." One can even use the Water Plus setting (When set properly) to give two rinses in place of one, which is useful sometimes. 

Personally, I'd recommend keeping both if possible in any way. Each set has its plusses and minuses. The Miele is built for 10K cycles and has far more options to assist you customising your laundry. You may be able to boil wash with them, add extra options etc. The Speed-Queen is designed to get the job done quickly with no fuss. Some "creature comforts" from the Miele would have to be manually performed, but build quality is shown with a lifespan of 2.5x more cycles than the Miele can do. So really, its a toss between no fuss, "just do it" attitude, or some extra choice with some more "BS'ing" in-between. The choice, is yours.

No you are right about rinsing times, though I think it has to do with the tumbling action working the detergent out of the clothes. 

I think some of the issue with FL machines (especially in the US) that take forever and a day to complete relates to water heating on 110v, detergent action and a different style of wash that is gentler for most clothes.

That said though, our Miele often shaves a good 20-30 minutes of the expected running time after decides that there isn't a full load in there (Cottons is 2:10 at 40º a tad longer colder and shorter (1:45) at 60º, but increases again from there). The cycles I use get the job done in about an hour in most instances, and deliver great results. The extra water level used in these cycles, and my extra temperature addition really gives everything a great wash. Again though, programmes that I use are only designated for 3 - 3.5kg capacity, which explains that...