I started a game with a druid and the XP cap removed. Do they get any special abilities or such when they pass 14th level or beyond ( like the hierophants <<?). I dont want to go so far then come to a dead end with this character. Havent played D&D since , well before 2nd edition, so my knowledge of the classes is rather lacking now .

They don't turn into heirophants. But Druids aren't worthless just because of that, they have lots of good spells; summoning elementals without having to go into a mind-battle to control them, Iron Skins, and the ever-useful insect plague.