After almost waiting for an year this week I redesigned the series crossover with just 2 passive components. The crossover now has just one inductor and one resistor. The inductor works as a filter element for both the tweeter and woofer and the resistor for damping woofer resonance. Yesterday evening I assembled them and just listen them for one hour. I was blewn away by the transperancy of the vocals, depth in low end and the airness in the highs.
I am now fully convinced that it's only how the crossover is designed dictates any multiway speaker designs. Also topology, orders, drivers and box loading also matters with the highest priority to the crossover.
Attaching my discovery crossover topology for those keen to know more.