Yes, i had an OSD with MALAYSK mod.
On track change and radio station change it showed OSD just like when incr/decr volume
What is OSD for you?
As far as I know the radio and mediaplayer mods that Malaysk made, were PIP modifications.
OSD is used by hardware to put a menu on top of "whatever" that is currently displayed on the screen. We are here talking about DVRs, Tuners, cable-boxes, media-boxes that "super impose" their menu on your TV. That is something completely different than an overlay or PIP.
So please first explain what you mean with OSD.
Edit: I searched ALL Malaysk's posts and threads where he presents and supports his firmware mods, or literally any other post by him on XDA. I can't find in any post the OSD description for apps you mean. He only mentions OSD languages in (only) one of his 1722 posts (but neither does he mention PIP in all his posts).
And you really mean a small screen? Or do you mean a "running" string in the notification bar? This can be easily doen with Xposed which he uses extensively.