I think the same can be said for judo and in fact any martial art - the simpler the technique, the more succesful they often are.
A technique, which should work against a resistant opponent should be easy to practice with a non-resisting training partner.
That means if you get too confused about the 12-step set up of your technique whilst practicing, forget about using it in a fight.
However, if you have adapted a higher skill level than more difficult techniques can become easy.
About turning the back - well, actually, you are not supposed to do that for very long, it should only be part of a continues movement. And there are often situations in no-gi fighting when a few more throwing skills would come in handy.
The magical place - well that's the mat, the gis, the referees.
And the gi does allow you more grip variations which make certain throws possible.
On the other hand - you are wearing a gi yourself, by that making yourself vulnerable, so it's an even playing field.
Judo has it's set of rules which some people find restrictive, but the MMA tournaments which I have seen, also have their rules, even if they only stop the guys from killing each other.
So, the interpretation of what is "better" is up to individual preference of course.
No-gi judo videos - Neil Adams has a few no-gi techniues on his armlock and strangling videos . IMO an attempt to profit from the no-gi fashion and I doubt the usefulness for the experienced MMA fighter.
( I used to traiin at his club in Coventry, one of the best judo fighters on the ground ever, but shouldn't do no-gi stuff)