I have been wondering this for years as well. I'm a BIG fan of Morrissey and the Smiths.And was planning on making a similar post, but I'll chime in on here.
I've heard theories of Leo ASC and I just don't see it - he is a introvert, especially when younger and his ambivalence about taking about his love life lends me to think, planets on the 8th H. Plus the overall dreariness of his early lyrics - a song about the Moors murders (8th H Mercury comes to mind).
With a Libra ASC - Venus would be his chart ruler in Cancer in the 9th H opposite Saturn and moon is now in Sag conjunct Jupiter in the 2nd - his values are very important to him and he is very emotional about them - hence his outspokeness about veganism, etc...
This is one theory. But I'm no pro astrologer.
I'd love to hear others.
Here is my theoretical cart for Moz: