Christ Jesus and Mary Baker Eddy both demonstrated that an imposing venue is not necessary or even desirable for a sermon or a service. So far as we know, most of Christ Jesus' itinerant ministry was accomplished en plein air. Too much emphasis on the visually engaging might well be a deterrent to some who are uncomfortable in such surroundings.
The substance of a church is not what is material without, but what is spiritual within. It is Truth, Life, and Love expressed in the lives of members and the resulting Christly atmosphere emanating therefrom which will attract "honest seekers" to our churches. It is not possible to attract everyone.
Christian Science may have flouished best before there was the preoccupation with buildings, business meetings, committees, and grounds-keeping. "Our proper reason for church edifices is, that in them Christians may worship God,--not that Christians may worship church edifices!" (Mary Baker Eddy, Miscellany 162: 21-24)