Should you revalidate the IR?
Well in my opinion yes you should, for a start it shows an airline that you are in some sort of instrument currency when you do get an interview.
You will also be up for jobs against people who have a current IR and that would be a plus point for them and against you if yours has lapsed.
Finaly try flying a SID/STAR in two years time, in a jet sim or the like, when you havnt flown any proper procedures in years and to add to it this is the first time since the MCC that you have flown a jet. Im sure it would realy impress the sim instructor!!!
Unfortunatly you need to keep all the eggs in the air, let one drop and the others will soon follow.