I agree with what good old crazy haired Al said:
"As simple as possible, but not simpler." (And that would be Einstein, not any other crazy haired Al.)
That said, I have a number of series 80 Colts, and have never had any hint of a problem from that "mod" over the years.
And I have had a few of them have some nice trigger work, and can't feel the difference between them and my Wilson's trigger.
The lowest paid college major/degree in this country after graduation...
Now, go figure...