I don’t think it’s meaningless. The fear mongering about increasing the default limit size in the client has been proven to be nonsense so far, since only 0.001% of transactions added have used it, and Bitcoin is not destroyed. It’s going to take awhile to scan the blockchain data for transactions with OP_RETURN data >84 bytes before and after block 930600. To clarify your claim, do you think that there is a greater number of transactions whose OP_RETURN data is >84 bytes after block 930600 than there was before that block, or by “huge increase in numbers”, do you mean a greater amount of data is stored in OP_RETURN after block 930600 than there was before?