Is there a Paragon map for the HOTA version?

A bit late, but still.

Yes, Paragon exists for HotA, but it was modified not by the original author, but by third-party individuals: http://forum.df2.ru/index.php?s=&showtopic=27944&view=findpost&p=742596

Also, Wayfarer exists for HotA, and the situation is similar: https://vk.com/topic-59561616_29192589?post=18533

In my opinion, the HD mod brings the most significant improvements to the game, not HotA. HotA is primarily a set of different rules.

HotA is a global expansion containing many changes to various aspects of the game. This includes a number of interface improvements (although not as many as in the HD mod) and bug fixes (and there are already many more of them than in the HD mod – although some of the fixed bugs may be intentionally used in maps). A description can be found here: http://h3hota.com/ru/documentation – in the relevant sections.

Therefore, people's desire to play maps on HotA is quite justified (naturally, the HD mod is fully compatible with HotA, and its advantages are also preserved). However, due to gameplay changes, compatibility with SoD maps is often lost. In the long term, it is planned to disable gameplay changes on maps in the SoD format, but for now, users can fix many problems in the map editor, which has already been done in some cases.