Some interesting data about this defense..

[fredtoast]

Here are some blitz numbers for the Bengals defense the last 4 years under Guenther.  I don't have a "ranking" for total blitzes because PFO splits the blitz numbers into "rush 5" and "rush 6+".

Remember that if a 4-3 defense has to blitz a lot to get pressure then they are in trouble.  For a 4-3 to be successful they have to be able to get decent pressure with just the front four.

RUSH 5 rank
'15....31st
'16....32nd
'17....30th
'18....30th

RUSH 6+
'15....10th
'16....18th
'17....24th
'18....23rd

DB BLITZ
'15.... 6th
'16....14th
'17....24th
'18....23rd

TOTAL BLITZ % ("rush 5" plus "rush 6+") 
'15....22.7%
'16....19.2%
'17....17.2%
'18....15.2%

Clearly the Bengals have been trending lower in their blitz percentage, but it also looks like the league overall is blitzing less.