Jesus statement that when two or three are gathered in his name he is in their midst, seems to suggest that he is with us differently when we are together than how he is with us each as individuals. This would mean that there are things that happen when the church gathers that cannot happen when she doesn't.
If this is true, then it is a strong defense for the concept of corporate grace that is NOT available to individuals alone--which is the argument for sacrament, whose Mother would be the Church. If that is true then the Church is no longer an option--she is essential to faith.
A definite shift in imagination.