Gorgeous palm and really you've managed to get some speed out of it! When we were living on Big Pine Key, our next door neighbor had a small baileyana he had purchased I think at Fairchild around 2010. He planted it and it just sat..and sat...and sat..for years. Just never did anything except put maybe a leaf or so on each year. We couldn't figure it out, since after all we were as close in the U.S. as you can get to its native land. Then we got smacked by the right eyewall of Irma with 4-5' of ocean water for a full day, and after that soaking, suddenly the thing started growing! I didn't track it further the last few years so am not sure if that growth-spurt continued, but it was notable enough for my neighbor to mention it. Who knows whether the salt actually affected it, perhaps it was also the nutrients (ocean-bottom sludge, sargassum, overflowing septic tanks, etc.), but I certainly noticed an effect on a number of my own palms in the ground after that burst of salt and nutrients. In any event, I love that you use the term "a new flush of leaves"...there are a lot of growers of this notoriously slow species in cool climates who I'm sure fantasize about the very idea!