Estrid is great even in a 100% junk deck desu. I've played with the precon deck upgraded with the three Theros Archetypes only for like 4 months. Archetype of Endurance can be slapped on the board on t4 easily and protecting it is ez pez with all those masks and counter stuff in Bant pieces of the pie. For me she is THAT commander - really want to try something new but it's always "I'm gonna give her that last game today. Maybe tomorrow as well. But I swear to you guys there will be no Estrid next month, seriously".