So communion won't be commemorative enough? I don't think so.
Ezekiel 43:18-26
18 And he said unto me, Son of man, thus saith the Lord GOD; These
are the ordinances of the altar in the day when they shall make it, to offer burnt offerings thereon, and to sprinkle blood thereon.
19 And thou shalt give to the priests the Levites that be of the seed of Zadok, which approach unto me, to minister unto me, saith the Lord GOD, a young bullock for a sin offering.
20 And
thou shalt take of the blood thereof,
and put it on the four horns of it, and on the four corners of the settle, and upon the border round about:
thus shalt thou cleanse and purge it.
21 Thou shalt take the bullock also of the sin offering, and he shall burn it in the appointed place of the house, without the sanctuary.
22 And on the second day thou shalt offer a kid of the goats without blemish for a sin offering; and
they shall cleanse the altar, as they did cleanse it with the bullock.
23 When thou hast made
an end of cleansing it, thou shalt offer a young bullock without blemish, and a ram out of the flock without blemish.
24 And thou shalt offer them before the LORD, and the priests shall cast salt upon them, and they shall offer them up
for a burnt offering unto the LORD.
25 Seven days shalt thou prepare every day a goat
for a sin offering: they shall also prepare a young bullock, and a ram out of the flock, without blemish.
26 Seven days shall they purge the altar and purify it; and they shall consecrate themselves.
It would seem that the purpose has to do with cleansing the Temple furniture during the Millennium. It could not be for us, since the death of Christ was the only sacrifice needed for that.
Hebrews 10:4,10-14
For
it is not possible that the blood of bulls and of goats should take away sins.
By the which will we are sanctified through the offering of the body of Jesus Christ once
for all.
And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins:
But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;
From henceforth expecting till his enemies be made his footstool.
For by one offering he hath perfected for ever them that are sanctified.