I use JWM and I don't have it. Even if I use LxDE I wouldn't install it. It seems with plymouth sometimes shutdown is delayed. I just like the no splash mode, I enjoy watching the kernel and boot text instead. Last time when I used LxDE I uninstalled it.
Edit /etc/default/grub (using gksu leafpad /etc/default/grub), and remove the "quiet splash" from the Linux command line.
After this run sudo update-grub2
Also from the GRUB menu, if you want to do this temporarily, you can hit E on a line to edit it, then Ctrl+X to boot the kernel line.