Why Beatty's signalling problem was bigger than one officer

Would a better signals officer alone have changed Beatty's signalling at Jutland?

No; a large flagship staff should have checked the signal's wording, transmission, and receipt, making it a broader command failure.

Beatty aboard Lion was surrounded by a chief of staff, flag lieutenants, the signals officer, the flagship captain, and other officers. Seymour may have been responsible for hoisting or transmitting a signal, but he did not work in isolation. Senior officers should have checked the wording, watched the transmission, and confirmed that the intended message had gone out. A disputed signal at Jutland is therefore evidence of a wider Battlecruiser Fleet staff failure rather than a mistake that can be assigned to one signalman alone.