Planned decels have been a little bit of an issue (on my end). I was approaching a fix with a 250kt restriction (had to manually input -  FLASK.OZZZI1 27L @ ATL) and it kept an adequate descent but leveled off with just 2nm to go and 50kts of speed to bleed (no "drag required" annunciation on FMS). Thoroughly enjoying the product, glad there finally is a [decent] 767 for P3D v4. I put a lot of time on the FSX version as well as some other devs.