Zees: You miss the point of those Chumros though. Chazal weren’t searching out Chumros to constantly make people more Machmir, which is what R”L, a small portion of the community does now. Chazal added Takanos and G’zeiros when they saw that people were having trouble keeping to the D’Oraisas without additional Harchakos.
Oh, and if you eat Afikomen before Chatzos it’s to be Choshesh for a Shittah that Chatzos is D’Oraisa (R’ Elazar Ben Azaryah), not because of the first Mishnah in Brachos.