My Master Plan addon is up to date, but the latest version doesn't seem to be placing low level followers with Harrison. You have to put the focus on the low level follower in the interface to get it to do so. I'm referring to the following parameters:
1) Select "Follower experience" in the drop-down.
2) Set tentative parties using alt-click.
Just wanted to let everyone know. Of course, I could be missing something important. Maybe MP is prioritizing LV100 followers on the higher XP missions. But I don't think MP should be prioritizing those followers over lowbie followers. Power-leveling low level followers is one of the main reasons Harrison exists. Thanks.