I noticed that there is now a package context-legacy.r69173.tar.xz in the TL/archive subdir . I contains a lot of stuff "tex/context/patterns/mkii".
Yes, Siep created context-legacy to continue to support mkii. I guess I have to package that and upload it into Debian. Indeed. If you want to support that original context. Please confirm. Hans has prepared a new context(+luametatex) release for tl24, which I will import into TL as soon as I have a chance. So I wouldn't spend your time worrying about what is in TL now. (Although I don't expect the structure of the packages to change, one never knows ...) --best, karl.