It feels like Steel Wing should have a bigger range.
Perhaps a Two Tile Spray?
I think it should be like this because, the move itself is limited to little Pokemon. So it wouldn’t be that over powered. and it does proved excellent coverage to these Pokemon.
And, other similar moves. Such as Wing Attack are two tile sprays.
(I’ve actually noticed that it became a TM again in Generation 6. Perhaps once the new version of PMU is updated. Staff will add it. Or Add it some time soon in this version. Not sure really. )
Anyways. Is there anyone who agrees with me?