Yeah I kind of had a similar thought these things are pretty powerful and I think up until level 10 they do deserve a +2 but after 10th level +1 seems more reasonable and around 15 they aren't adding enough for an LA. So all and all they are another example of great for LA Buy off. I think more than anything these threads have shown me how useful and good the LA buy-off system is.
I am not seeing an argument for anything over -0 LA on Maulgoth