Joseph M. Smith said:We may not have complete descriptions of New Testament worship, but we do have references to the earliest Christians meeting in homes for prayer, exhortation, testimony, and the agape meal. Much can be intuited from Paul's letters, especially I Corinthians, about early Christian worship.
But there is also the letter of Pliny to Trajan, asking the emperor how he should handle this "sect", as he calls them, and he reports on his investigations by saying that they gather, they sing hymns, they pray, and they share in a meal. Sounds pretty simple to me! They would not have had the physical resources to mount an elaborate liturgy.
I have only limited exposure to Orthodox worship, but do acknowledge that it has the capacity to elicit from the worshipper that sense of the "mysterium tremendum et fascinans" that so much of evangelical worship ignores.
Very balance, I say.