The sim is aiming towards 20-30 sacks seasons for elite DEs only, and honestly for this we can count out gutted teams since you won't need fumbles there.
So, your putting a ton of SP into a skill that has a chance to activate perhaps 15-20 times in critical games over an entire season? I can think of multiple things that would be better to spend the SP in.
If you are getting 5+ sacks a game it may be worth it. If you aren't then put points into something that will help you get sacks. I personally would not waste my points into it.