....L-1011 was somewhat "over-engineered",
Without a doubt.
Having said this...there is not today a widebody civil jet transport airplane with more redundant systems, than the ...L1011.
A superb example of overengineering?
Absolutely...and nice to fly, as well.
Now, as far as the original selection of engines are concerned, I must leave this to others to debate, however....we do have one expert here whom I expect will chime in with the correct info....IE: a Lockheed guy for many years.