The rulebook says, I believe, that the homily may be preached only by an ordained cleric – a deacon, priest, or bishop. A lecture by someone with academic qualifications would quite likely be more interesting than the standard homily delivered by the celebrant, but that wouldn’t necessarily be an improvement in the Mass as divine worship.
No, never! I was present once at what was then our local parish church, when a young lady performed what I suppose was meant to be a “liturgical dance”. For me, and for at least some other people I talked to afterward, it was a disaster. Conclusion: No dancing in church! Ever! On any pretext at all!
I was in a parish once for Our Lady of Guadalupe. The parish had a large Hispanic population. They had girl do some type of dance before Mass (not during Mass). I feel like liturgical dance isn’t really appropriate in most American contexts. But I hesitate to make a blanket condemnation as there are a lot of cultures out there that are not my own.
The James Brown episode in The Blues Brothers shows dancing in church which is in every way unexceptionable. But we must bear in mind that, in this case, our experience is enhanced by Hollywood casting, choreography, camerawork, and editing. In real life, I still prefer to attend a dance-free Mass.
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