Simple framework I use when choosing match coverages:
Cover 6 - Help on the weak side
Cover 3 - Help in the middle
Cover 9 - Help on the strong side
Cover 2 - Help on both sides (but weak against the run)
Cover 4 - Help in run support (but weak on both sides)
What's your need, want, and wish for 27 gameplay? Mine:
Need defenders not to lose leverage so easily in match
Want adjustable run fits
Wish we had a play editor