There should always be help in the gaps if you're playing the defense the correct way. The issue with this year's defense (for the 80th time) is that people who weren't ready for rotational roles were playing rotational roles and were not in the spot they needed to be defensively when they needed them to be there. It is as much an understanding of the scheme than any defensive "skill"...the only way to get better at the understanding is to get older and get reps. You're not going to significantly improve the defense by simply plugging and playing unless you want to sacrifice the offense. The defense will be back in the 40-60 range next season (if they stay healthy) and the offense will be better