similar situation
I am currently in a similar situation of possible job change. location change in the same company. I have spoken to my lawyer and here are his comments.
a) I need to have a clear understanding with in the company that they will take me back on the same job, same location (old) after the 485 is approved. This may be for a month, but has to be done.
b) If I / we (me and company) can prove that, I am moving only temporarily for a project/ assignment it is better. May be a letter in advance will help.
c) Address change has to be informed any way or keep the existing house.
d) Even if, not get RFE, new address in new town may be an issue at the time of passport stamping and new FP for green card issuing, hence plan every thing in advance.
Start with your lawyer with a thought process, what happens when approved and then back it up to the present date. This way several action items will open up and each will have to be dealt with at appropriate time. Some of them like taking a letter of assurance from company that you will be given a similar job on the same location has to happen today. You may also consider changing your address to a new one (friend, relative, work place) in existing town and also maintain your existing driving licence till the approval.
Do, I make sense?