I think they did but I can't recall a second of it. Sarah also has gotten a bit more glam since then as well (though I have no doubt she can still bring the fury).
And yes, Mo's jealousy re: TK was no secret.
Probably all of the above on the Ted King situation, but I remember hearing MB was especially jealous of him.
Ted King and Laura Wright tend to have chemistry with most people they interact with (outside of MB and SBu for her lol), so I would have been okay with it. It seems weird they have not brought back his and Skye's kid to mix with the teen scene.
Did Claudia and Jax interact much? I can't really remember. I know Jax was part of all the shenanigans but I can't particularly remember him and Claudia.