Hem, as we all know, sources are for people who (want and) knows how to make changes, how to code. So, yes for such people sources is a must and nice to have. But those people won't choose lucera bcs of no sources and if they want to check some parts of code, they can do it through jar.
What I want to say is, if you share sources only wannabe admins will get benefits out of it.
But well, why not. Shits happening since years so that won't hurt l2 community