I understand what you're saying but I believe the issues of the new amount of next years cap plus how much dead cap $$ towards the next few seasons, impacts this decision. Looks like cutting Moulds ( 10.8 Mil cap hit in 2006 ) would carry a dead cap hit for at least 2 years. If you cut Williams in addition, then that figure would be extreme. You save 4 Mil by cutting Williams. Then you need to find a quality UFA to replace him,who'd cost 3-4 Mil. Where is the savings ?
The Bills probably wish to keep Williams and extend his current contract a couple years, to reduce the current cap figure. Then cutting him in a year or 2 wouldn't be too bad a hit, if it's determined he's not working out at Guard. If Williams says no to this idea, then they have to cut him now... but that means signing 2nd tier UFA's for positions of need ( if any) , due to little cap space for the next 2 years. The Moulds and Williams cuts would really tie our hands with dead cap $$ and take us out of the bidding for any quality UFA's until 2008. The Bills would be completely dependent on the Draft.
We already know signing bargain scrubs has been a failing exercise.