Well that’s not too encouraging, I looked over this thread and it seemed like adding LINUX_PLUGIN=/usr/lib64/pppd/2.4.5/rp-pppoe.so to the ifcfg-ppp0 startup file was the fix for speed and further down it seems that is now default via merge from @davidep so I am hopeful that actually worked.
EDIT: I just looked it over closer and it seems he was actually suggesting a different work around to get the line into the file.