Bush isn't to the right of anybody on anything except Roe, tax policy, the proper role of the courts and national defense. On everything else he's a liberal.
It isn't all that hard to be to the right of Bush.
I agree with most of what you say, but even with regards to the proper role of the Courts, Bush's fidelity to that cause depends entirely on Roberts,Miers (if she survives), and a third SCOTUS pick should he get it. W does not have the same excuses to fall back on that his father had with Souter (deception) and Reagan (Kennedy turning more liberal once safely on the Court). After going to bat for conservative appellate court nominees, Bush refused to do so for the Supreme Court.
So if either of Bush's picks turns out to be another decades-long mistake, then there will always be justified condemnation of him for not taking the opportunity to nominate a candidate with a better track-record, and then letting the dice fly. The only legitimate excuse for a mistake these days would be if Bush had put someone like Luttig or Brown or Garza on the High Court, and then he or she did the unlikely and turned left.