You can post your observations and suggestions about new look of Spark here Spark look and feel refresh
I think this menu bar is part of the new Flat theme. Not sure if much can be done about customizing this menu. Personally i don’t like that menu entries are in the titlebar itself instead of being on a separate line, but this is probably how it works on Windows 10. On Windows 7 menu still shows up on a second line.
I don’t think this is a huge issue. Most users probably don’t use menu that much.
I have replied about Pade window issue in SparkMeet thread.