I think its great when different people work on the same lyric
it just shows how different it can be done
and no matter where it goes you own the write on it
and if you work on a 50/50 basis then if something happens with it
then you win,
I think the cream always rises to the top
so if something is good enough and the performer musician is good enough
it will find its place, lyricists want the best singer / musician / production they can get
just like in reverse they look for the best lyrics,
if the two come together one day fantastic
I say copyright your work and get it out there to be used