This is simpler than you realize and you already have part of the answer here:

1. You are not the pastor, and he is not your wayward curate.

2. You don't actually know that something needs to be done, because you don't what it is, or how. And unless people have somewhere else to go, collapse is less likely than loss of good energy, and miasma setting in.

Can't tell if you were being ... ironic, but I was serious, not snarky. People need to take responsibility for communicating their issues with the pastor to the pastor; for them to try to deputize you as their advocate is a form of injustice to you. If he's demonstrated a pattern of blowing his flock off, then to the vicar forane or regional bishop, if any, though that's really something that doesn't have traction with the kinds of things you've listed.

People do need to talk directly with the new pastor.

If he is not responsive, they then need to meet directly with the Bishop - telephone calls to a chancery may be pretty much a waste of time 'cause things get "filtered" before they get to him.

The bishop KNOWS that giving has dropped in the parish and possibly putting this guy there may be a move to close the parish down.

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I have noticed a trend among younger priests--no matter where they went to seminary--to stretch the homily longer than it should. This, in spite of admonitions to the contrary by Pope Francis and several bishops. I have no objections to a long homily as long as it says something. Having a captive audience must be tempting!

As for the extra commentary and joking around, there is no place for this.

Salieri, the fact that your pastor is making the effort to learn the Latin Mass is impressive. Maybe, that is a starting point for you to have an honest discussion with him.

Over at pray tell there is a series of one minute homilies. Perhaps they could be of inspiration.

Well, if it was filmed for the TV Mass, then lots of people will see it, right? And there'll be lots of people complaining to the bishop? Don't you think this pastor will be shuffled off to Buffalo in short order?

We all know that our most troubling adversaries can be those aligned to “our” side of the liturgical divide. As an example, many Latin Mass Catholics were recently upset by Fr. Z’s unqualified infatuation with Donald Trump and felt such praise does the cause more harm than good. More personal and local, the biggest mistake of my career was accepting a parish MD position offer from a priest who touted Theodore Marier’s hymnal as the greatest thing since sliced bread. Little did I realize that his admiration would not extend to liturgical praxis.

The public speaking virus that infects so many priests, as detailed by Salieri above, has reached a pandemic stage - at least in the Northeast. So few Catholic homilists seem to know how to home in on a single point and tie all thoughts to it. Is it that the priest shortage causes seminary admission directors to overlook the need for attracting people with the capacity for critical thought?

Though my words may seem to indicate otherwise, I try to be understanding. I’ve written for homily services and know how difficult it is to write something concise and meaningful week after week. Public speaking is not something most of us are born to do. Great preaching is a gift that can’t be easily taught and we shouldn’t expect every parish priest to be a John Henry Newman or a Fulton Sheen. But we should expect that seminary candidates know basic grammar, rules for composing a cohesive paragraph and common mistakes of speech. (The nonsensical “anyways” is so common in my locale that my fingernail marks are immortalized on organ benches throughout the Boston Archdiocese.)

Not knowing when to shut up of course appears to be a fundamental nationwide complaint. We all perhaps need to reflect and work on that, but in the seminary it needs special emphasis or at least a nod to the wisdom of St. Francis that to preach is not necessarily to use words.