You can still use OP_RETURN. I highly doubt that it will be dropped. Try pushing it through other pushtx options like blockcypher or blocktrail's. You can also try pushing the transaction through your own full node, that should work. Blockchain.info is just being stupid as usual.
Hey thanks for the reply. Let me invite you to a cofee https://blockexplorer.com/tx/aa02fd76ad9004df566722d4f68a276def329c5f59ac25ca40fca718036f2227
If anyone else can provide any information on why I should not use OP_RETURN, I will award it.
I strongly prefer to pay somebody now rather than pay the consecuences in the future
