Here we have QUEEN Righteous Authority still very much able to command a gathering of ponies with just her presence due to the respect that she has rightfully earned over the years, though with her younger subjects not being able to hold back their mutterings of sheer 'dawwness' since what the King has in regality the Queen has in adorability, in spades I might add…
her already stellar approachability increased tenfold which would keep her even more busy dealing with many a problem great or small that may arise in day to day Ponyville.
The smaller hooves that comes as an added bonus of being a mare making her even better at tinkering with small contraptions and inventions, i think this addition is what she will miss the most.
Her already large plot even more peachy and plump as a result of the gender swap, now accentuated by her smaller frame probably caused many a nosebleed, though she would be completely oblivious to it as she definitely experiences tunnel vision from her workload, not that this bothers her however, she thrives on being busy and helping ponies in as many ways as she can.