The fear that lurks in every conservative's heart:
Explain to me how you make the leap from Miers to Souter........
President GWH Bush didn't know Souter well and most likely never had a personal meeting with him except for some minor interview prior to announcing his nomination.
On the other hand President GW Bush has know Ms. Miers for over 10+ years many of which have been in a very close working relationship with her. Thus he has a much better insight into her ideology than X41 did of Souter and doesn't have to take the recommendation from someone else, imo.
You may not trust the President to know her and has maybe misread her ideology over the years but your comparison isn't nothing more than a red herring which I assume you wanted it to be.