I think a lot of your points are highly subjective.
She has advanced the role of the monarchy and made it more durable? I think that is highly debatable. I think the monarchy is now as unpopular as it has ever been. Whilst I think a large proportion of the blame for this can be laid at the door of her family as a whole, I think it is undoubtedly the case that there exists a larger proportion of the population who would happily see the UK as a republic than at any time before. I accept that this is probably still not a majority of the population of the UK, but it is sizeable. In fact, I suspect that an equally large proportion of the population's attitude to the Queen and her family is one of indifference. They might not dislike her and they may not want rid of the monarchy, but they are not enthused by her.
She's retained power in a highly skilled and adroit manner? She is a highly gifted diplomat? Again, highly subjective opinion of her abilities.
I'm disappointed. I thought you might come back with some concrete examples of when she has been 'remarkable'. I genuinely cannot think of a single instance.