More glory than we might imagine

Behold, these are they who died without law;…

Who received not the testimony of Jesus in the flesh, but afterwards received it.,

These are they who receive of his glory, but not of his fulness.

These are they who receive of the presence of the Son, but not of the fulness of the Father.

Doctrine and Covenants 76:72,74,76-77

Being able to see Christ and be in His presence, I begin to suspect that many in the terrestrial kingdom will not even feel any envy fit those in the celestial kingdom. They may well feel that they received everything they had hoped for (if not more).

These are they who receive not of his fulness in the eternal world, but of the Holy Spirit through the ministration of the terrestrial;

And the terrestrial through the ministration of the celestial.

And also the telestial receive it of the administering of angels who are appointed to minister for them, or who are appointed to be ministering spirits for them; for they shall be heirs of salvation.

Doctrine and Covenants 76:86-88

Those in the telestial kingdom will still have communion with those in the terrestrial kingdom so that even though they do not enjoy the presence of Christ they will not be deprived of association with many of their friends and family.