I switched from 13.5 to 13.12 and I have to say I am very disappointed, the new theme is really bad. I love the simple old Default Theme, which is no longer available, only as Old Default (Legacy) for which you need a license. Please let us use the Legacy Theme without a license. I am now switching back to 13.5. and will not install any more updates in the future. A very very disappointed fan of the first hour.
BRING BACK THE "Old Default (Legacy)" THEME