Easier than unplugging three clips? Is that what you're refering to?
You could switch the mounting order of the batt's and ESC/Rx. Mount the battery pack with some velcro, tape or zip ties on the top of the tray. Then you could mount the ESC and Rx under it. It will change your CG a bit though.
If you're really desperate, i've removed the batt's by taking off only the one, rear clip. The tray will "pop-up" just enough.