This is what Apple does with just about everything. (How is a little colored dot 300 pixels to the right of a file name in list view better than what we had before?)
It should be noted that Firefox doesn't have an easy way either. You have to go to Preferences > advanced to clear things out. At least Safari gives you the option of turning on the Developer window and clearing / disabling the cache from there.
For me, El Capitan creates some serious productivity hits so what I have done is this: I took my Mountain Lion startup drive - on my Mac Pro tower - (complete with tons of installed apps and the settings the way I like them) and cloned it using Drive Genius. I then upgraded one of the two to El Capitan. I then restarted from my Mountain Lion drive, took my copy of Parallels Desktop and created an OS X volume. I moved my virtual machines to my El Capitan drive and booted off this drive.
(The following part is a hassle, but Parallels doesn't support direct OS X migration from a hard drive attached to the Mac.) I then put the ML volume in an external enclosure, attached this to my other Mac (a laptop) and connected the two using an Ethernet cable and fired up Migration Assistant on both machines. Working from my Parallels ML volume, I migrated everything from the ML drive attached to the laptop. I also set up the ML virtual machine to share my main data drive, which I use for all my projects and for storage.
That was a huge headache but now I can run both El Capitan and my fully loaded Mountain Lion virtual machine (including my older version of Safari, with the reset function) side-by-side and switch back and forth without a hiccup. Frankly, I still handle my email from the ML virtual machine because of bugs with the new version of Apple Mail. Once the bugs are worked out, I will drag my email content between volumes for parity.