I upgraded my S80 to 5_45 / 5_44 a few weeks ago, also got a bunch of extra features. Both desired and undesired.
Most annoying is the undercarriage warning. It is also annoying that all settings are lost when updating fw, I have email this to LX and they have put it on the to-do list.

There is so many settings in the configuration that I had to do a checklist with all important parameters documented. Please feel free to use it:
https://drive.google.com/file/d/0B1U...ew?usp=sharing

I have just hooked up the trailer on the car, going to competition this weekend. I will not try the new fw until I see positive feedback. I get the feeling that Ls lets us customers do the beta testing, as almost all fw updates introduces new bugs.