3pt shooting is the most misunderstood and underutilized weapon in HD. That being said, I am an aggressive attack coach based on 20 years RL experience and my utiliziation of the "3" in HD, I know what works for me. The short answer is that type of high PE, low distro will cost you 4-5 games a year. At least that's what it gives me a year. I love to beat teams with high ratings on paper but who in fact defend their own 3pt shooting by underutilzing it.
Only, let me put it another perspective. A 50% big is a potential All Conference performer and most coaches would be happy to have one. Yet a lot of coaches are reluctant to let a 33% 3pt shooter shoot. They produce the same amount of points on the same amount of shots. Now let's take that a step further. 35% from 3 = 53% 2, 37%= 56% and 40%=60%. 33% is good, 40% is unbelievable!
If we play a game and everything else is virtually equal, your formula will provide you with 3-4 made 3's a game for 9-12 points. I'm going to shoot about 23-25 3's and my average over all seasons in HD is between 37-38%. If i shoot 25 @ 37% = 9.25 shots made or a little over 27 points. I have outscored yet by 15-18 points JUST by a more aggressive approach to 3's. I win decisively soley because I utilized the 3 better than you. I can't give you my formula because I don't want coaches getting more aggressive. It happens to be one of my big advantages. I will say generally my 50 PE guys start shooting 3's at 0. There are adjustments from there depending on their %.
I hope this different point of view gives you something to think about in formulating you coaching style. Best of luck in the future.
5 3 shooter