This trade should be financially legal as I verified on the Spotrac trade machine as this offer stands. Not exactly sure why Fanspo says no.
I really don't know how to value picks too much with the new lottery change, but I think proven young players will be a bit more valuable so Podz and Moody plus the 11th pick feels like a solid offer for Trey. I'm unsure how many teams are actually offering better but I know few team can over a pick this high in this draft to the Pelicans and assumingly they want in. I could see another 1st include but I very much dont think a 3rd 1st round pick would be included, at the very least without some kind of protection.
This helps the Warriors improve in a way that allows them to trade Jimmy for impactful role players if they can get Lebron to sign for one of the exceptions. Otherwise they might be betting on Jimmy coming back healthy and able to impactful.