We have discussed preaching before (priests & deacons), perhaps those interested can search for one of those threads.
In short - some deacons are excellent preachers, and some are very poor. The same is true for priests, unfortunately. As such, the solution of “not letting the deacon preach” is not a good one. What do you do for the priest who is a poor preacher? Not let him preach, either? Of course not.
The solution is simply to help them work on their craft. Even a very poor preacher can become better; and excellent ones can become exceptional. There are Toastmaster groups open only to preachers, for example. I have tutored other clerics to help them hone their preaching.
Forensics, in my opinion, is among the most valuable skills one can learn in secondary and college level studies. Regardless of what career or vocation you settle on, the ability to speak, convince, articulate, and explain will be of great benefit to you.
Ministerial work requires lots of disparate skills and abilities, and it is rare to find someone who has all of them. I know great preachers who have terrible bedside manners. I know wonderful confessors that are poor teachers. I have priest friends who can’t carry a tune to save their lives.
No one has everything that Jesus had, no one. Preaching is simply
a more visible gift, and is thus the first thing criticized (or praised) in a priest or a deacon.
As far as people not seeing the point of the diaconate; that is on us, the clergy to fix. The overall suppression of the diaconate in the West has only been corrected since Vatican II. Fifty-some odd years is nothing in the Church’s reckoning of time.
Diaconal functions were assumed in the West by priests over time; so people need to be catechized to help with that.
Priests who work collaboratively with their deacons have great benefits to their ministry. Deacons who are truly helpful are greatly sought after. Those who have little to offer are not.
As far as relates to Eastern Christianity, deacons have always existed, and are highly respected and in great demand. The Divine Liturgy is far better with both a priest and deacon concelebrating. Every priest wishes he had a deacon, but they are hard to come by. Most of the time the bishop ordains them to the priesthood in short order, as priests are also hard to come by.
So, many bishops see the value of the diaconate in Christ is different ways. To a Western bishop many things can be delegated to them, to help with priestly shortages (baptisms, weddings, funerals, preaching, blessings, etc.).
Eastern bishops want deacons because they make the liturgy better, and add a completeness to parish life, even though they don’t receive delegated power to do any of the things that Western deacons do.
In short; Western deacons help with priestly shortage and in the East they enhance the quality of public worship. In an imperfect example we might say: Quantity (West) vs. Quality (East).
Deacons are here to help (the word means “servant”). Diaconia is about serving others in love,
Deacon Christopher