I say keep the old ones. One shouldn't be so hung up on the first meaning of a symbol, if you think about it as a war memorial, then that's all it is. Though, nowadays they could be more culturally sensitive and go for something with less ties to religion.
When I was young, there was a god with infinite power protecting me. Is there anyone else who felt that way? And was sure about it? but the first time I fell in love, I was thrown down - or maybe I broke free - and I bade farewell to God and became human. Now I don't have God's protection, and I walk on the ground without wings, but I don't regret this hardship. I want to live as a person. -Arina Tanemura