Do you know why Airbus pilots get stuffed in lockers in middle school? This is why Airbus pilots get stuffed in lockers in middle school.
I know how this stuff works, I just think it's weird. And honestly, I find it funny that we can, on this forum, go from endorsing Freedom Fries, and then a few years later say, "But wait, the French did this other really weird thing...AND IT'S TOTALLY AWESOME!"
So allow me to respond to a few things as the Resident Airbus Hater.
I don't like the HSI being on the ND, and the reason I say it doesn't count, is because it's a primary navigation instrument. The HSI is below the AI on every single airplane made since about the 1940's, but NOOOOOO, not on the Airbus. The thing belongs on the PFD, like every other airplane in the world. Do you know how ubiquitous this placement is? The Space Shuttle had an HSI below the attitude indicator. If it's good enough for America's Space Eagle, it's good enough for me.
Also, I love the argument that since FBW exists, trim doesn't need to. It is not REQUIRED to exist, but there are plenty of FBW planes out there with elevator and aileron trim, specifically Boeing, EMB and Bombardier. Airbus is, without question, the outlier here. And it's not because you CAN'T do it the way Airbus has the aircraft setup, because clearly you can. It's that it's WEIRD. Not unflyable, just weird. You know what's weird about it? Airbus decided that since The United States of Freedom created manned, fixed wing flight, and then perfected how to make the flight controls work, that Airbus couldn't POSSIBLY follow in the footsteps of those simpleton Americans. No, instead of the stick commanding flight control deflection, the stick would control RATE! Because nous sommes les français!!!
But in the end, the boss tells me to fly the Airbus, so I figure out how to curse in French and learn to accept that the Cult Of Airbus will become mortally insulted if anyone ever says, "Yeah, I get how it works, but that's really strange," or said in French, "Nom de Dieu de putain de bordel de merde de saloperie de conard d'encule de ta mere."
EDIT: Also, regarding the thing reverting from DES to VS without being commanded to do so, I couldn't tell you why it does it, but it does. Could be a software thing with the planes we have, but it only seems to do it when in a managed descent where it hits an altitude constraint and there are mountains under me.