Like in topic - of course it is not a must, because most i3 users probably have some experience in configuring .xinitrc. But since x11-misc/slim supports session dir out-of-the-box now, it will be nice if i3 will put its own session file in /etc/X11/Sessions. I think it is closer to a bug than to an enhancement, but fell free to recategorize if you want.
+*i3-4.1.2-r1 (12 Mar 2012) + + 12 Mar 2012; Kacper Kowalik <xarthisius@gentoo.org> +i3-4.1.2-r1.ebuild, + -i3-4.1.2.ebuild: + Install session file in /etc/X11/Sessions wrt bug 407493 by Paweł Rumian + <gorkypl@gmail.com> +