So while you are still enjoying the 2019-09 release, the Eclipse team works hard to improve your UI experience.
For example, the perspective switcher will look in the next release similar to the other toolbar entries, which removes several little UI bugs on various platforms.
Here is a screenshot how it looks like in 2019-09.
Here is a preview how it will look like in 2019-12.
Other nice small enhancements are that the filter icons will actually look like filter icons and not like… moving something to the side.