I also used to serve on the Worship committee at a former congregation. However, over time, I have become convinced that these committees are not healthy. First, I think it is primarily the Pastor's responsibility to plan Worship, to include hymn selection to go with the appointed readings of the day, in consultation with the organist/choir director. I also think the Pastor should be making sure that choir selections meet the appropriate doctrinal standards for incorporation in the Divine Service.
I have concerns when the Worship committee usurps the authority of the Pastor in this regard, or at least thinks it has that ability. This area is one of the most important, visible roles of the Pastor, and one that should not have a committee that has a lot of sway over it.
I've never heard of a Worship & Music Committee meddling in the content of the Pastor's sermons, or in selecting the individual hymns. Every one I've ever known of was basically the Altar Guild, responsible for seeing to it that all paraments were properly cared for, the ones with the correct color were used each Sunday, that the flowers for the Altar were ordered and paid for, plus bookkeeping on memorial donations for flowers, and issues like that. When the choir director needed sheet music, it was the responsibility of the Worship & Music committee to acquire what was needed. The Worship & Music committee was responsible for seeing that the pianos were kept in tune, and the organ and PA system maintained in good repair. They also made sure that there was always an adequate supply of appropriate wine and wafers for Communion. They were in charge of making sure that the choir and acolyte robes were cleaned and pressed as needed. If the pastor were to announce that he wanted a particular program for Wednesday evenings in Lent, it was the Worship & Music committee's responsibility to make it happen as he wanted it to happen.
The committee I mentioned earlier did an outstanding job of carrying out their ministry. The functioned like a well-oiled machine, taking care of all the details that needed to be taken care of. They simply didn't want anyone suggesting that they do anything within the scope of their duties the least bit different from the way that they always did it.