Pandeists believe that a Creator did set forth our Universe before completely becoming the Creation. Not so for Pantheism, where God is everything, there is no 'creation' or 'beginning' since All is God. In Pandeism, a Deity created our world before fully merging with it.
Pandeism - Wikipedia, the free encyclopedia
That's right. Deists think that ancient texts, doctrines, dogmas ect. are unecessery in order to form a coherent philosophy of God. Deists focus on a God Theory that relies instead on scientific understanding, reason, observation and/or intuitive thinking. Deist are of the opinion that the idea of 'God' is still very much a relevant concept worth believing in so as to explain the great mystery of our very existence and that of our Universe as a whole but one that has been plagued by supersititions, irrational thinking and extraordinary claims with no evidence for too long.
But the deist will no hesitate to change or drop his beliefs if ever proven wrong. That's because his beliefs are elaborated from reason, he doesn't have any source of authority, or 'middle-man' telling him what Is and what Is not. He is a freethinker.