Thank you for bringing that interesting topic. The reasons he gives for exaltations and depressions are horribly untrue for the Southern hemisphere (which does not exist for Tropical astrologers). Because if you follow Ptolemy, Australians have the Moon exalted in Scorpio. Reverse the zodiac, if you follow Ptolemy.
I reject these for other reasons. They do appear to be partially connected with seasons,
even though, they are used by almost all traditional and modern astrologers, sidereal and tropical. Their origins is ambiguous, some say it is related to the ''secret houses'' of the Babylonians, which used a sidereal zodiac, but it could be the case that 19° was the presumed vernal point of the Sun, therefore exaltation degree*. I also reject the lunar and solar axis, of which I have not seen one practical example or usage.
The bounds are of Babylonian and Egyptian sidereal origins -
http://dlib.nyu.edu/awdl/isaw/isaw-papers/1/ , and in my opinion are related to specific fixed stars and asterisms. Although everyone says ''there is no pattern'', for me there is a clear pattern -
https://www.astrologyweekly.com/forum/showpost.php?p=856712&postcount=13
If there was no pattern, there is no connection to the seasons. I do not hate the seasons, they should be taken into account for the Sun, especially for mundane work, but do not say that the zodiac is based on that.
The zodiac is based on specific 12 constellations on the ecliptic. Their rulers are entirely explainable using the Seven-Zone system. Place Moon in Cancer, Sun in Leo (because they are Foundation and Beauty and should be together) and all other planets easily fall in the correct domicile - ''Thema Mundi'', which surprisingly has Cancer Asc, not Aries. Now there can be a few explanations for why the Lights fall in these places:
1. Seasons.
2. Sirius rising with Cancer in Egypt. Moon being the nearest ''planet'' makes sense for the first sign and Asc in the Thema Mundi.
3. Cancer being very faint and related to the water like the Moon and Leo being the symbol of the Sun.
I prefer 3, which is a reasonable and satisfactory explanation for me. Do not pretend that is not a true archetype for all nations and cultures.
And even if the ancients thought it was 1., they were wrong because they did not take into account half of Earth. Ptolemy was wrong.
Therefore only 2. and 3. can be true.
* - https://www.astrologyweekly.com/forum/showpost.php?p=858319&postcount=100 Because some people think that the ancient siderealists who erroneously used tropical imagery were tropicalists, I am now officially a tropicalist too. The vernal point is the start of 5° (6 ordinal) Pisces. Try it out.