Forget empty blocks, antpool appears to be mining with their soft limit still at 750000 (as are slush and a few others).

https://www.reddit.com/r/btc/comments/426fjx/so_whos_mining_small_blocks_answer_inside/

If you dont like the idea of leaving money on the table, I'd suggest moving to another pool.

Edit: Hmm, I see miners don't get the fees from the pool so probably moot. Not great for the nework though.