I've been playing a paladin since vanilla although never really got to max level with one until they added experience to battlegrounds. Way back when I heard tell that in the development of the paladin class at one point they had the abilities mentioned above in the title.
You might be thinking that we have Crusader Strike now, but I have to tell you it wasn't the original implementation. Originally Crusader Strike did holy damage, instant, and increased holy damage by the target by a fixed amount stacking to five. Righteous Strike was an on next melee ability that turned your damage to holy and increased it by x amount similar to the old heroic strike.
The reason they weren't implemented was, I believe, that blizzard didn't want paladins to be too similar to warriors, imho was far from being true.
I say bring back that Holy Avenger feel by giving us a way to change our attack to deal righteous holy damage and get rid of inquistion by implementing the crusader mechanic in a different form. Not only will it bring us back to the days of holy damage but get rid of that annoying buff which really doesn't have a good reason for being.