I think it’s Interesting to ponder whether or not there were people in the patristic age who, when the Liturgies were first being changed to meet local needs, carried the banner of “liturgical abuse.” Of course, as time passed, what was once considered novel and an abuse became common and traditional. Just thinking out loud.
I visited two separate EO Churches a long time ago when I was not yet in the Catholic communion. In both churches, there were people who came late to the DL only to pray in front of an icon and then leave before the DL was finished. As an outsider, I thought it was an abuse. I mentioned it to some other EO folk who said that was not normative. About a month or two ago, there was a thread where a Latin Catholic visited some EO churches in Europe, and he observed and complained about the same thing. It made me stop and think that maybe in the eyes of many in the Eastern Tradition, this is not an “abuse” but is just part of the Eastern Liturgical experience. I was an outsider at the EO DL, just as the Latin Catholic was an outsider, and we were just noticing things that, as outsiders, we were not used to,