Point taken, AA. However, it's worth remembering that most of the whining in this instance has come from inside palace walls - thanks to self-justifying authorised biographies (Dimbleby/Morton) and relentless media briefing.
The sophisticated news-management techniques of modern royal press offices are unlikely to be discontinued after the next coronation. Hence widely-reported concern that we risk a head of state who operates with a politician's apparatus but without political accountability.
The armed forces of the Crown depend on public trust for their legitimacy. That trust has always been given on the understanding that the Crown remains aloof from politics as a single unifying symbol. It's a fragile arrangement and, in the 21st century, people are unlikely to trust any organisation that doesn't live up to its own publicity. Unlike happier, simpler times, loyalty - even to the Crown - is a reward for honest dependability.
If future generations of recruits believe their loyalty is being earned as well as expected then they probably will suck up everything service life throws at them, lumps and all. But a note of caution seems appropriate. The current comfortable status quo won't last for ever.