On the appeal: Stuff most certainly changed in the xml, or the gameplay wouldn't change. That said, I think it was still a bug fix, with the bug being that they forgot the Appeal="-1" in the xml earlier. This because I'm almost 100% sure (basically as sure as I can be without having put effort into learning the civilopedia by heart and without having screenshots) that it was in the civilopedia before.
That said, the -2 it has currently seems to be incorrect. On the other hand I now have a beautiful -8 appeal on that one Industrial Zone tile I got.
This is Civilopedia's entry pre-patch:
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_TITLE">
<Text>Neighborhoods and Appeal</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_1">
<Text>Neighborhoods are a special district that allows a city to house more [ICON_Citizen] Population and is affected by Appeal. The term “Appeal” is used to describe a special form of adjacency bonus that just applies to Neighborhoods, and also will affect Culture Victory’s [ICON_Tourism] Tourism system through National Parks and Seaside Resorts.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_2">
<Text>Breathtaking Neighborhoods provide 6 [ICON_Housing] Housing.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_3">
<Text>Charming Neighborhoods provide 5 [ICON_Housing] Housing.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_4">
<Text>Average Neighborhoods provide 4 [ICON_Housing] Housing.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_5">
<Text>Uninviting Neighborhoods provide 3 [ICON_Housing] Housing.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_6">
<Text>Disgusting Neighborhoods provide 2 [ICON_Housing] Housing.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_7">
<Text>Finally, Appeal also affects the ability to place National Parks and Seaside Resorts.</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_8">
<Text>A tile's Appeal can be viewed in its tooltip and is affected by the following:</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_9">
<Text>+2: Each adjacent Natural Wonder</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_10">
<Text>+1: Each adjacent Holy Site, Theater Square, Entertainment Complex, or wonder</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_11">
<Text>+1: Each adjacent Mountain, Coast, Woods or Oasis</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_12">
<Text>+1: If the tile is on a River or Lake</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_13">
<Text>-1: Each adjacent Industrial Zone, Encampment, Airport or Spaceport</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_14">
<Text>-1: Each adjacent Rainforest, Marsh or Floodplain</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_11_CHAPTER_CONTENT_PARA_15">
<Text>-1: Each adjacent pillaged tile</Text>
</Row>
<Row Tag="LOC_PEDIA_CONCEPTS_PAGE_CITIES_5_CHAPTER_CONTENT_TITLE">
<Text>Buildings</Text>
</Row>
No mention of Mines or Quarries. This was a nerf, not a bug fix.