These abilities are definitely low powered. They would also be spread out over 20 levels without any additional buffing. Here are the Servant of Badna abilities.
Badna Babble (Ex): Even if the legends of Badna are but constructions of Abalach-Re’s, the servant of Badna uses the
teachings to their full advantage. She gains a +1 bonus to Bluff and Intimidate checks at 1st level. At every odd level thereafter, the
bonus increases by +1.
Riot Control (Sp): Servants of Badna are used to dealing with riots. When the servant of Badna casts spells with the
(Compulsion) descriptor requiring a Will save, such as calm emotions, the save DC increases by 2.
Subterfuge (Sp): Raam is a chaotic city where not even templars feel safe in the streets, thus they have learnt the art of
subterfuge. Servants of Badna can alter their appearances as per the disguise self spell once per day, granting a +10 bonus to
Disguise checks. The duration of this ability is 10 minutes/class level.
Skitterish (Ex): Servants of Badna are paranoid, expecting ambushes and assaults in any situation. They gain a +2 bonus to
initiative. This bonus stacks with the Improved Initiative feat.
Slippery Mind (Ex): This ability functions exactly like the rogue special ability of the same name in the Player’s Handbook.
Immune to Surprise (Ex): The servants of Badna’s paranoia eventually results in that they are never caught off-guard. From
8th level, a servant of Badna can always act in the surprise round. However, the servant of Badna loses sanity, reflected in a
permanent 2 point Wisdom loss, which cannot be restored, not even by a miracle or wish spell.
Voice of Badna (Su): Once per day the servant of Badna can use greater shout as the spell. The save DC is 19 + the servant of
Badna’s Charisma modifier.
Definitely not overpowered and a lot weaker than the pathfinder bloodlines. The other PrCs for templars are much the same.