Hi,I am not allowed to talk about weaknesses of other designs
but I can talk about the strengths of mine...
1.The symbols I have used cannot be misinterpreted as symbols of spiritual salvation and are universal in terms of religion,I strongly believe that your target group is not Christians only.
2.Every logo should be able to translate into a one color version(black on white) without loosing detail or having to change any details.
Best regards
Stickie