Phoenix Dive is a strong offensive teleport, but only in combination with oil/poison surface. In the Arena is it kind of the basic opening as a warrior: Impale + Phoenix = Boom!
For itself of course it is weak, similar like the racial skill of lizards and only works to setting stuff ablaze, but with good preparation it mattersless than the weakness of the lizards racial.
Perhaps those teleports should be give longer buffs now, to compete with the 'new' skilltree.
But we would really need infos if skill restrictions will be planned. Now you can learn at least 4 kinds of selfteleportation without hardly any skillpoint investmentm that is kind of insane?