I would hazard that it is worthwhile. I haven't done an IR yet, but am in much the same boat as you Jay. I did an IMC last year and it is useful in terms of being able to do more whilst hour building weather wise.
Plus it's challenging, good fun (the first solo cloudbreak is an interesting experience
) and you'll be picking up skills you'll have to use for your IR later on.
Cheers,
raisin