Not really? The chronicles lore basically said that the titans were created with the warcraft universes equivalnt of the big bang - light and void clashing on a big scale, which caused a big explosion from which the physical universe was born. The titens were basically big leftover energies from that event. Thats pretty straight forward.
"The First Ones made everything" on the other hand only makes sense until you start asking, who made the First Ones then? Or how did they come into existence, when there was nothing before them?