Pretty spot on there I reckon- Madge has the right vision but not the right execution. The pathway he and club have set up can be continued, with new coach undertaking to continue the way, but unfortunately I just cant see Maguire surviving. For the plan of his and WT to mature their youngun's with a levy of key experienced players just hasnt been possible - his recruitment ability / charisma just isnt there. JAC nope, DWZ nope, Lomax nope, TPJ nope. He cannot attract the experienced core WT needs to guide the others along. That is the be all and end all of WT getting through this.
It's not clear to me that our inability to attract players to the club will be solved by punting Madge. To take your specific examples, Melbourne were willing to take swap JAC for Talau but the club refused. DWZ went to the Bulldogs because we couldn't pay him. Mary had to offer Lomax the starting fullback role to keep him away from us, even if it was only just for one game. The club organised a delegation to meet with TPJ and couldn't get him to sign. To keep running with examples, Madge wasn't even allowed to call Paul Vaughan until he'd left. All of this smacks of an administration that doesn't have their shit together and are too timid after being burned by their poor mistakes in the past.