When you create subtasks, be sure to remove user-notice, notice, Roadmap.

Some good points at https://www.mediawiki.org/wiki/Topic:Sfjyqa42qruwvlbb ("No indication of topic length in the ToC")

Diego Moya wrote:

The new Table of Contents, combined with the lack of page structure brought by infinite scrolling, cause a loss of intuition about the relative length of discussions. Old talk pages give an spatial indication of the size of topics (using the number of sub-sections and the amount of scrolling in the scrollbar) which is now lost, making it hard to find the most lively topics - everything looks the same in the new ToC.
You could add some secondary notation to convey similar information. The most obvious is adding the number of replies to the right of the topic title at the ToC. There could also be some visual cues, giving more weight to longer threads - for example, adding color to topics with >5 comments, and bold typeface to topics with >20 comments or several indentation levels.

He7d3r wrote:

Or... the menu which currently shows "Recently active topics" could have more options, one of them to sort the topics by the number of replies, and other by the sum of the length (bytes) of the replies.

Diego Moya wrote:

In fact, I find it quite difficult to find the topic "New indentation and threading model" in the ToC every time i want to revisit it, despite I know it's one of the longest threads.
Topics with the most activity should be more salient; the current list of topics in the ToC makes all topics look exactly the same.