I would considering taking Marshall with the GS pick if we get it. A month ago I would not have even considered it. Marshall proved a lot to me during the tournament. First, he was the engine that ran the train in NC. That is what the Jazz really need. They need a PG who can distribute the ball to our scorers. Marshall's shot, though ugly, has improved and his ability to get to the rim was better than I had previously thought. He is sneaky quick. I don't think he is as slow as people say he is. All the games I watched he was able to keep up with most guys or get to the rim. His BBIQ is off the charts and he is a willing passer. I certainly think he can be a top 5 assists guy in the league.
As far as being able to guard the elite PGs, I would argue is there really any one in the league who can guard Rose, DW, Westbrook etc. Marshall's defensive technique is good and he seems to have good hands and size. Yes he like most people will struggle to guard the elites and that is why you double team those type of players. I think Marshall's size will allow him to post up some of the shorter guards in the league.
Yes the Jazz need shooters but they also need a PG who can get everyone involved because that is really when the Jazz offense is at its best. The Jazz don't have superstar offensive talent so they need to out execute other teams. The Jazz can get a shooter in FA or if they have their second pick select a shooter. One benefit of drafting Marshall is that the Jazz can play a two guard system with Marshall and Devin Harris being the SG. I like Harris at the SG when he and Tinsley played together a few games ago.
Unless someone drops that I think is better than Marshall, I would be happy picking Marshall at 9 even though I would rather pick him with our pick.