The added realism with DCC, especially sound, is a superb addition to the hobby, as are working lights but my bug bear is seeing trains with the loco tail lights still on! Arggh! I'm not going to criticise the 156 [ even though I haven't received mine yet Charlie! ] but I for one hope that this situation is rectified in forthcoming new models. So, let the manufactures know.
I'm off for a brew