Even if it’s not as strong having a guy like chinn on the field as your nickel means you aren't deficient against the run. With TEs being bigger receiving threats now than before you are also looking for guys that can deal with them. Some teams use tall cbs. Some safeties. Some lbs. Some mix and match. Some rbs require the same attention. It’s why guys like chinn, or if he had worked out, Simmons are so valuable. Being able to adjust your coverage and disguise it without changing a personell grouping is invaluable. Alignment (4-3 vs 3-4) is less of a factor than in years past because we see less of what used to be base personell for offenses.