Complex sentence: While the "world heavyweight" title is traditionally considered the most prestigious weight division in most professional wrestling promotions, CMLL places more emphasis on the lower weight divisions, and the CMLL World Heavyweight title is not considered the top CMLL championship.
Split into simpler sentences: While the "world heavyweight" title is traditionally considered the most prestigious weight division in a professional wrestling promotion, CMLL places more emphasis on the lower weight divisions. As such, the CMLL World Heavyweight title is not considered the top CMLL championship.