I think getting the figures out at a price point that an fit an average kid's allowance back then probably dictated how detailed they ended up being.
To this day, I don't get why the Jawa got a cloth cape and everybody else got that goofy vinyl thing.
I did see a vinyl cape Jawa on the pegs once, but passed on it as the cloth one looked "right". If I only knew!
You usually had to wait for a birthday or Christmas to get one of the ships or a playset, but you could get a couple figures a month. Maybe more if there was a sale.
The sculpts did get a lot more detailed after Empire.
One the other end of the scale, the large size figures were incredibly detailed and hold up very well today. But they were more expensive, and the line faded away around the time Empire came out. Kenner probably only did a 12 inch Indiana Jones because they could reuse the Han Solo mold. Nevermind Indy's haircut looks nothing like Han's. ;)