Ok you're taking that out of context:
You literally quoted what I said before the but, this ignores the point that was being made. The point I was making was that small changes are common, I think you're jumping on these small changes rather than seeing the big picture.
An argument you can make for small changes is that when you go to buy a set that is repeated due to it being iconic or having many iterations (R2, Batmobile, Millennium Falcon) you would want the most up to date version. I bought the 2011 Millennium Falcon, the next one that came out to my knowledge is the 2015 edition for Starwars TFA. Looking through the instructions, they're slightly different but the 2015 edition is made to tie into the movie release.
To comment that a slightly different version with separate mini figures designed to coincide with a movie is inferior due to minor changes is not a good thing, is to not appreciate the set as a whole.
A proper analysis would be as has been suggested is to compare, for example, the 2000 edition and the 2011 version or the 2015 version or even the kessel run version.
Is it bad for designs to be updated over time, be it minor changes to coincide with new releases with new minifigures or major changes like the basic construction design.
The colour changes can be fine but when the design is being repeated a lot and nothing unique is coming, that is bad repetition, you may cite the colour changes in some of the examples above as being ok, you may cite the minor changes as ok but doing so invalidates your argument for the Falcon. It too is an example of minor changes, how is racers different here?
Edit: Grammar and word corrections.