User blog comment:Emptylord/Season 3 - PBE Patch Notes/@comment-3529242-20121116201133/@comment-4909453-20121116212236

From what I'm getting it is the boot3 are "add-on" passives that will not remove boot2 that you currently have. I may be getting this wrong, but it said "ehancement" which can either mean to have an add on, or change change it.