I installed SP3 for Revit 2014 and it fixed the callout line weight plotting issue. I was hoping it would fix an additional issue we were encountering. The architect is using a filled region to mark a designated area. In our MEP model, this designated area is turned off. When we plot, our devices that are in that area do not plot. The annotation associated with the device still plots. We tried everything we could think of in visibility graphics. The only thing we could do is delete the filled region prior to linking.
Revit MEP 2015 Certified Professional
Revit Architecture 2015 Certified Professional
AutoCAD 2015 Certified Professional
remember to 'accept as solution' if this helped