Game like training environments NEED to be a part of your training. In season, but definitely throughout the off season. 

Its the only real way to stress test your training to see if the changes you've been trying to make are translating. If they are not, it's a really simple way to see where the holes are and how you need to adjust going forward. 

Don't be afraid to heat check yourself, failure in practice is a good thing. Learn to solve problems in practice so you can adjust faster in the game.