I'm just another spectator talking through my hat but I think he should leave the Ode up but provide an explanation that it was from an earlier time when he was still trying to sort things out. To play the devil's advocate, it might also serve to reach some people who are in that particular state of mind whereas a hard anti-Scientology position might turn them off. If he is promoting a paid service for helping people recover from Scientology then I could see where it would be consistent with this.
I'm not a defender or a critic of Marty. I'm just glad to see that he is out and trying to rebuild his life and take care of his family. Most people just want to make it all go away at that point and Marty could evaporate his entire blog in an instant but I think it serves a greater purpose by letting people see it as it is warts and all.