Well, post that Compatibility Pack download, both map packs were in rotation for about 5 or 6 hours, then suddenly there was a playlist update and Devastation had its own lobby as would be usual and now that's the only way to play those maps...
I got to play HCTDM on the main list (since there was no Devastation playlist at first Thursday) with all the maps for a few hours.. and it was pleasant lol