From 2004-2011, Lebron averaged 33% from three. His best season was 35.1%
From 2012-2017, Lebron averaged 36% from three. Five out of six of those seasons, he was 35.4% or better, with his best at 40.6%.
That's an obvious improvement you can't deny. And you can't claim it's all on lower volume, because his best number ever for made threes/game is 1.7, and two of the three times he's hit that were since 2015.
Same goes for playoffs. Lebron's best playoff season ever for threes was....THIS year, at 41.1%.
Lebron's best season for made threes/game in the playoffs was....THIS year, at 2.4 a game.
Up until 2010, Lebron was a 30% three-point shooter in the playoffs. Since then he's averaged over 34% three-point shooting in the playoffs.
Same with midrange jumpers. From 2003-2010, Lebron was about a 32% shooter from 10-16 feet and a 37% shooter from 16-23 feet.
From 2011-2017, Lebron has been a 41% shooter from 10-16 feet and a 39% shooter from 16-23 feet.
In fact, Lebron's midrange averages from 2011-2015, when he was peaking, were BETTER than any four-year stretch in Kobe's entire career.
Again, same goes for playoffs. Lebron has averaged 40% from 16-23 in the playoffs since 2011, a number he had only hit ONCE before then.
Lebron shot 49% from 16-23 in this year's playoff run, tying his best ever.
49% on long twos and 41% on threes in an 18-game playoff run, and you claim that he "never developed a good jumper."