The guy who VA'd for all the added Johnson lines in this mod is TheVocalButcher! He is on both RU-vid and twitch. Should definitely give the guy a look! He does some pretty neat stuff
You couldn't see Johnson because you have to like actively look for him, and those D20G drop so much stuff you've missed, really gotta check the weapons on the floors better
Whenever you have a bunch of d20s, find a open area with lots of cover and try them if any of the results are a keeper. If you use them in battle then you may lose or ignore the goodies.