There are a number of practical downsides to using too many EMsHC:
- There are so many sacred vessels that people other than clerics and instituted acolytes (the only groups that are allowed) often purify them.
- Scheduling EMsHC can become a nightmare. It can also become a source of power.
- Staff time is spent on scheduling.
- The more EMsHC, the greater probability that deleterious cliques will form.
- The sacristy can really turn into a loud circus.
It really depends on the coordinator and the organization. Done well, even this is not a problem.
I will give you our parish as an example. Our seating capacity is big, perhaps about 1500.
We have 16 stations thus require 16 OM/EMHC. It is hosts only Communion. That’s really a lot, huh, especially for some of you who have never seen such a crowd.
We have four masses on Sunday - 7am, 9am, 11am and 5pm. The cathedral is always packed to the brim, plus standing room at the back and outside. If you attend second mass (9am), and if you finish by 10.15am, the entrance would be packed by the 11am crowd who would rush in immediately as soon the the second mass congregation is being emptied out, to get seats in the pews.
So how did the coordinator do his job? The answer is roster. The EMHC are given a station each on each Sunday. If they cannot serve for some reason, the coordinator must be informed so that replacement can be made (usually from volunteers EMHC from the Saturday sunset mass).
How about the ciboriums? It has to number sixteen for each of the distributor. Usually about 12 or so are consecrated during the mass and the rest will be from the reserved in the tabernacle. Just before the Lamb of God, a few EMHC would take the ciboriums containing the consecarted hosts from the tabernacle which is in the weekday chapel at the back and the give to the celebrant. I know the diehard tradionalists here will die hearing this. It has to be done because the celebrant would not come out of the sanctuary.
During Communion, the EMHC will receive from the celebrant and will be given a ciborium each and then proceed to their station where the ushers would direct them to where they should stand.
At the end of the Communion, any left over hosts will be placed in a few ciboriums and reserved in the tabernacle by the EMHC for the next mass. The cycle goes on.
No problem. The coordinator is placed with a responsibility to serve and to look into the details. Often it functions like clock work to the minute details.
The EMHC are well trained and show the greatest reverence for the Most Holy Eucharist by their demeanor, their attire, and the manner in which they handle the consecrated bread.
Nobody crowd the sacristy. The procession is from the weekday chapel. Only the priest would come out of the sacristy, so no crowding. One has to be a bit imaginative. Certain things need not have to be a big problem.