The revised ICEL liturgy is a huge improvement on the old. We tried it out a few months ago, including the musical settings.
Although the texts cannot reasonably be faulted, the same cannot be said of the musical setting for the responses. In the first place, they are written on a five line stave. Apparently, there was discussion about whether to use square-note/four-line notation and it was thought that round note/five line was what most people are used to.
Of course, the latter is what most musicians are used to, but many choir singers are not musicians and are more accustomed to the Gregorian notation, especially for singing that kind of music.
A further difficulty is that music that works in Latin will almost certainly not work in English because the emphasis falls differently in sentences in the two languages. Both the choir and the priest ended up stumbling over the music for the responses. The notes do not fall naturally with the words.
This is something that will need to be revised if the new liturgy is going to be accepted.