I have been thinking about this for some time -- it should not be difficult! It is the Mass! There should be no ego and certainly no thought about entertaining or theater, or any ulterior motive at all. If Catholics don't want to praise the Father and offer Jesus to the Father and RECEIVE Jesus into their own hearts, souls, and bodies, getting them there "by any means" just seems immoral.
The Mass is perfect as sacrifice and what is done prior to and following the offering must be simple and beautiful. The prayers are written, presumably by experts finding precise words for the day's celebration. They can be sung or merely prayed. That should be enough participation by the congregation, other than actually making the sacrifice their own.
The sweat that goes into what extraneous songs to sing seems so unnecessary. Have Adoramus or some other publisher put together a few Catholic hymns for the times preceding and following all of the prayers written and intended for that Mass. Please don't have Martin Luther or Charles Wesley or other Protestant ministers or laity standing at the podium by proxy making all of our Masses ecumenical prayer services. Bring back Catholic musical tradition; but leave that to the time outside of the Mass itself.
Put the choir back where it belongs -- out of sight! The congregation should not have to watch the music director go through his/her gyrations and the choir shift and shuffle. We should be focused entirely on the altar and on what is going on there. Giving musicians center stage and making the songs during the Sacrifice what the people come for is just wrong!
I realize that in the years since Vatican II, pastors have felt they must find an active liturgical role for as many of their people as possible and the emphasis has been on getting women involved in the liturgy. We have seen the abuses thereby created. The fact of the matter is that the liturgy should consist of the priest-celebrant(s), the altarboys, and the lector (preferably male). All others who want to be Catholic and help with the Church should do so by praying, helping with the coffee and donuts, visiting the ill and the imprisoned, volunteering with the parish and school, studying the Bible and Church scholars, etc. There is plenty to be done and more; but just because the Mass is the most visible and most important part of being a Catholic does not make it fair game for everyone who has the desire to participate therein!