How to move the last line to the next page while still aligned to the bottom?

Question

In this question, the accepted answer suggested to use \enlargethispage{-\baselineskip} for moving the last line to the next page.

However, the situation I'm encountering is that a long footnote near the last of the second page forced that page to stop earlier, and since in the book it is set to be aligned at bottom of the page, the second page looks a lot emptier than the first page. In this case, I would like to move the last line of the first page to the next page so that they look more even -- but in the mean time still keep them aligned at bottom.

Below is a MWE. As you can see, vertical space between the paragraphs on the second page has been stretched. In this case, can we move one or two line(s) from the previous page so that the two pages on the left and right seem more even?

\documentclass{book}
\usepackage{blindtext}
\begin{document}

\blindtext[5]

\blindtext[4]\footnote{\blindtext}

\end{document}

Answer 1

With long paragraphs you can almost always choose a different set of linebreaks, here \looseness=2 asks tex to try to make that paragraph 2 lines longer, which gives the page breaker chance to break the page without stretching \parskip

\documentclass{book}
\usepackage{blindtext}
\begin{document}

\blindtext[5]

\looseness=2
\blindtext[4]\footnote{\blindtext}

\end{document}