Geno will take the underneath stuff, the other guy couldn't or wouldn't, the TE's have become very dangerous in Seattle and have to be accounted for, everyone knows about DK and Lockett now, but the TE's will pull coverage off them so a defense cannot cheat, if the defense sells out to stop the passing attack we have a running game that has yet to really get attention but there and will get better as this line gels.
Same with the defense, we looked horrendous when we put a bunch of later round picks on the field for two years, Officials call tickly tack shit on them because they have not learned how to not reach out and get noticed, seasoning and a repour with officials will cut a lot of that down.
What we are missing is a big ass immovable object in the center of that D line to eat space and create mismatches to block him.