Fact: Sims has done a great job filling in for Staley.
Fact: He's more comfortable at LT than RT.
Fact: Niners have invested in Staley to be their LT.
Fact: Rachal and Snyder are getting better.
Based on these facts, it doesn't make good sense to make more changes. One of the things that's hampered offensive progress has been the OL's lack of cohesiveness. It looks like it's starting to happen, so I believe in the adage if it's not broken, don't fix it.
Having said all that, I still believe we need to draft a top OT and OG. I'd also like to see us re-sign Pashos. We need a stronger overall OL and the way you get that is to acquire better players and coach 'em up.