#1: yes. you get new LRA values and torque values
#2: no. multi-hp (NOT multi-speed) motors do not do the same thing as autotransformers. motors that use autotransformers, change the resistance (sorta) but then after it is up to speed, it will bypass the autotransformer and the motor is connected across-the-line. multi-hp motors do not start in 1 configuration and then change to a different configuration later.
#3: no difference. both motor types act the same during a low voltage condition.
"Right" is not the same as "Wise".
Don't step on my favorite part of the Constitution just to point out your favorite part.
Just because you can measure it, doesn't mean it is important. Just because you can't measure it, doesn't mean it isn't important.