Middle LB drop is Tampa 2.
not sure that too many teams base up their coverage.
Arthur was usually matched up with a crossing pattern, roaming the middle of the field, not as deep of a zone as what you drop to in a tampa 2.
Tampa 2 is more or less a cover 2 d, lets your guys play the football (i.e. nigel jumping routes)
The reason that nigel could be effective in the league is his ability to lock up the other teams best receiver.
If you take away the deep ball like you would in a tampa 2 with the safeties and let your corners play more aggressive you would think he could do the same things that he has done this year (albeit against a much higher caliber of receiver)
The Tampa 2 (cover 2) and all of its variatons aren't going anywhere in the nil for a while.