Hockeysfuture.com places LA's prospect pool at #26:
http://www.hockeysfuture.com/team-rankings/
That was also done before Zykov (whom they rated as the organization's #3 prospect) was traded and before most teams (but not LA) improved their pools by adding 2016 1st-round draft picks.
Bleacher Report, which did its analysis after the draft (i.e. only a month and a half ago), places LA's prospect pool at #30:
http://bleacherreport.com...every-teams-prospect-pool
Now, you can argue that they don't understand the team's prospects as well as a fan does and that they under-appreciate the value of "identity" and "fit," but they're also unbiased, which a fan cannot say. I bet that just about every fanbase would grade its prospect pool as better than is represented in either of the reports above, believing that their knowledge as fans makes them right. They can't all be right, though, and most are likely wrong, since they're naturally inclined to be optimistic. You can't fault fans for being optimistic, but there's also a fine line between being optimistic and fooling oneself.
That said, having a good prospect pool is not necessarily the end-all if you already have a good team. I agree there. You might get by and extend your window simply by adding utility players. It doesn't make it a good prospect pool, though, and adding nothing but utility players isn't going to work for long. LA may not feel the pain of having a poor prospect pool right now, as they tread water with 3rd-liners who fit right in at the NHL level, but the pain will be felt eventually, when the window starts to close and those 3rd-liners aren't enough to keep it open. That's when they'll really need the quality prospects that they just don't currently have.