I really like Open LP but the interface to edit each slide is cumbersome. There is no option to stretch the image you wish to use as background. Also you can't format text on the fly.
I find the theme idea cumbersome. Is there any way this will change in the future?
Currently my church uses Easy slides which hasn't been updated since 2011. It tends to freeze a lot and sometimes the features don't work so I'm currently fishing around for a new worship software to use.