Paragraph styles with first line indents should not show indents at the start of a new page or following a different paragraph style (such as a block quotation)

Although it is suggested that a workaround is possible using two manually applied paragraph styles, one with and one without the first line indent, this is infeasible for situations where a paragraph starts at the top of an automatically paginated page.

If I set these manually, then if any change is made that affects the pagination of the document (esp. in long docs) then I have to go through the document resetting paragraphs that have changed their positions on the page.

The first line indent is a standard requirement in all of the academic style guides I know. It should work correctly in LO.

Summary: A first line indent should not appear in a paragraph that begins a page or follows a paragraph with a different style - e.g. a subtitle.

I do not think it should be automatic because there are different style guides and even personal choice.  In order for there to be the option of "no first line ident in first paragraph of page", the odf specification would have to be amended.  Then dialogues would have to be changed to allow the user to mark paragraph styles.  Or there could be a document or page setting that would apply the no ident rule regardless of the paragraph style but that might be less desirable because there could be instances where you do not want it to apply.

For the "following a different style" use case, you can create a new style that is the same as the one that would follow but without the ident and has the original style as the next style.  Then you can modify the preceding style e.g. subtitle to have that new style as the next style.

Set to ENHANCEMENT.