I mean what I think I've already said. The blame seems to be whatever some people want to throw at SP, that somehow he ran his mouth and blew the pick, when in fact the reporting all refers to another team 'picking at 12 or below' as being the ones Mahomes told the Chiefs about.
The trade up bit is purely my supposition, but it seems logical that if they wanted him that badly, with their draft history regarding targeted players, that they would have been trying to trade up. Instead the Saints draft room story seems to read as if no such moves were being made.