I watched the first 3 seasons of Lost but I didn’t think the references were over the top. To be honest I didn’t even notice them until they were pointed out. Obviously because Lost was such a big thing and OUAT is done by the same people, there is going to be references but so long as it’s not so in your face, I don’t see a problem. For example, the 42 minutes until landing, yes 42 is a Lost number but it doesn’t shout LOST REFERENCE!!!!!! at the top of its voice.