Hi sbaguz,
I did create a prototype of an Arch based dCore, it created .tcz packages and pulled from the Arch Rollback Machine, now called the Arch Linux Archive. It only lacked a base packed with the Arch linux files of Glibc and the like. But the import tools and the 6/1/2014 Arch repo worked enough with dCore-jessie and it's 3.16.6-tinycore kernel to boot into an X desktop with fluxbox. The files are located below if anyone would like to look at or use them. Since it would use the Arch Archive, there would be no need for an update routine. Just simple install. The flagging of packages for unintstall upon reboot would be the same as Tinycore.
Rolling release would be a problem due to the fact we use a base system that is static and tied to a particular repo, whereas Arch linux would update all files when say Glibc is updated to a new major version at any time.
Of course, many packages would need custom startup scripts just like with Tinycore/dCore due to the use of symlinks rather than real files among other reasons. But the groundwork of the import routine is there is anyone wants to make use of it.
http://tinycorelinux.net/dCore/arch/