Diaz boxing is not the thing that needs to improve in order for him to beat GSP, its his TD defense... Diaz has the best boxing FOR MMA IMO & if GSP stands with him for 5 rds then there will be a new WW UFC champ.
Unless Floyd Sr has been keeping secrets & can teach Nick Diaz how to be a much, much better wrestler in world record time, his help is not needed for this fight.
For the record, I think Diaz has a 50/50 chance vs GSP as it is, without any improvements, he has better hands, better BJJ, at least
as good cardio, a better chin, more heart, more grit & 5 rds to do it.
I`m actually picking Diaz here in this fight since I already think its 50/50 & I like him much better & will be rooting for him