Greetings!
Over the last few months we've been communicating Domination's features through a series of regular dev diaries. Considering the diversity of content being bundled up into this DLC, and in the interest of being more concise, we've summarized and assembled into this infographic new features included in EU4: Domination.
And for those wishing to revisit each DD for Domination and for the 1.35 update, here they are in in chronological order:
(I've marked with an asterisk DDs which cover the free content involved in the 1.35 update, but please note that some entries cover both paid + free content - so take care when reading to delineate the two!)