I totally agree that church pub­li­city could be designed a whole lot bet­ter, but it seems it should be up to us as design­ers to offer our ser­vices (free, cheap, or not, either way) to the church in order to pro­mote both the reas­on­ing behind the need for bet­ter designed mater­i­als, and the ser­vice of doing so.
(I often ref­er­ence Acts 2:42 about the pur­pose of the church: http://www.ebible.com/bible/Acts%202%3A42 but also remem­ber that there are oth­er pur­poses such as intro­du­cing people to God, etc.)