I prefer iPhoto over the new Photos app in Yosemite. It also annoys me, because every time I connect a new device to my Mac, I have to disable "Open Photos App when connected to this device" for that device. It also uses a spot from in my Launchpad.
Is there any way to disable/hide the new Photos App in Yosemite from the launchpad and disable it from starting up if any new device connects? I don't want to delete it.