Ask HN: Why is gmail so unchanging?

Perhaps this is a matter of opinion, but I am intensely frustrated with gmail. Why is it so awkward to use. Why is the task list so un-intuitive? Why is the calendar and task and email so weirdly separated. Why do I have to make a google plus page to send photos through gchat. I have eight of these things now.

Assuming these things frustrate people as much as they frustrate me; which, admittedly, is presumptuous. My real questions are, and my real interest. Why is this happening in Google? Is this something wrong with management. Design focus? Do they not have a way to get good customer feedback? Is this a legacy support problem? How can a main product get so few updates and be so uninspiring? Is having good design and good UI unimportant after a product become large enough? How do you adequately measure the need for change?