A new lineage wasn't created as 1 never faced 2. Fury may have defeated Wlad (who was the #1 guy) but Wlad wasn't the lineal champion.

You stated it is 'clear cut', sure it may have it's flaws, which I also have tried to highlight (mainly regarding deciding on a concensus #1 and 2), but a new lineal line has always been thought of as starting with a fight between the #1 vs the #2.

I would prefer to debate the best fighter in each division, rather than 1 champion, as these days there are to many flaws for lineal to be relevant.

All the facts are in this thread, people can decide for themselves.