Think we should cut him a little slack on one thing: Chrysler
were the ones leading the changeover to internationally sized FWD cars. A lot of that goes to the Omni/Horizon more than the Aries, but in the context of 1981 the Aries was a big deal. American-built VWs of the time were junk. Most of the Japanese cars were still generally too small and even more underpowered than American ones. GM spent a lot of time and money squeezing any quality the Opel Cavalier might have had out of it so they could build it here cheaper, just like they did with the Chevette. Ford did the same with the Escort, and their only direct competitor to the Aries was the larger, heavier, older Fairmont. But the Aries was still a pretty big turning point to show that American companies could design and build small-ish modern basic transportation without having them be complete garbage.
Would the Aries had been a big deal if GM hadn't fallen flat on their face with the Citation? Certainly not. Would they have eventually found something else anyway? Sure, since the Accord came along soon after and made it all moot anyway (and the Camry a couple years after that). But the Citation most definitely did fall flat on its face, and most Americans in 1981 weren't going to buy an Accord.
Cadillac outsourced the Allante because there was a (probably justified) belief that Cadillac couldn't build that car to the level of quality needed for what they wanted it to be and the (reasonable) view that Peninfarina building it would give it enough snob appeal to differentiate it from the E-Body Eldorado that it was based on and justify the price. They doubled down and built the Reatta, but that was different enough car that they probably didn't steal any sales from each other even though you would think they would once the convertible came out.
Chrysler outsourced the TC because they happened to own part of Maserati at the time and Lido was cynical enough to believe that his friend de Tomaso could quickly take a break from making his own horrible cars to turn out an ultra exclusive Italian K that was similarly different enough from the
Costanza Lebaron to justify
its price while undercutting the Allante. Then he doubled down and made the almost identical looking Lebaron anyway, which even then might have worked had it not debuted
first (because he outsourced the TC's engineering
to 1980s Maserati and was delayed three years).
There's no innovation in obviously copying a bad idea a competitor already had, but screwing it up even worse then they did.