thanks! I had already stumbled upon the mailing lists discussion, but is was mainly a dispute about the el->gr change, no bugs there. The bug report however is exactly what I needed and one of the comments contains a trick that temporarily fixes the bug.
So, for the few ones there who want to be able to write in Greek in OpenBSD (and in Xorg 6.9 generally) , just symlink el to gr in /usr/X11R6/lib/X11/xkb/symbols/pc . Most likely there have been some remnants forgotten behind during the process to change from el to gr.
