The problem with ''we need more 3 point shooting'' is that we have a lot of really good 3 point shooters. Ingram, Trey, CJ, Graham, even Nance this year - Jonas is good for a big, dyson looks like his shot might be way further along, etc. The issue is volume and that's nothing to do with the players. It's a purposeful stylistic choice that Green has been open about making on purpose.
Obviously that choice should change, we need to be shooting significantly more, but how do you convince Green to do that?