Back up with time machine then you can restore if you don't like it.
Well i tried it but went back to my backup as i didn't really find anything worth using, and hardly any applications would work.
Mavericks to Yosemite seemed like a bigger change.
What applications if you don't mind me asking? The entire adobe suite, Steam, League of Legends and all of the Apple apps work fine here.
Sorry for the short reply earlier, I was out and on my phone. HERE is the iStat Menus beta that works with El Capitan direct from Bjango (the devs). Enjoy.
Ahh thats why my task bar looks so clean and small, iStats are missing! Not sure if I will actually reinstall it :s
I only display the combo menu. You can select one visible item (I use network speed) and the rest are all nested in a context menu. Simple, clean and very useful.
Found the public beta way too buggy, finder windows kept going black, liked the rest of the changes though, will probably jump back in after a few more beta releases.