[Wheel Contact is all messed up, mains sink into the runway]

Agreed, it changes the landing (flare and derotation) behaviour significantly as well

[Wheels sink into the ground during touchdown]

Yep, it always happens no matter what. It's particularly bad for the A350-1000, but the -900 is bad too.

Just look at the behaviour here: https://v.redd.it/rwchh0htaime1

Or here: https://streamable.com/a5s9qy

And here: https://streamable.com/5t9tjc

And this screenshot from your own trailer:

These aren't perspective issues, the wheels sink in whether in normal flight or replay. Quite disappointing to see this on a £72 add-on when the completely free FBW A380 manages so many more wheels without such issues. Same with PMDG 777 -- the A350-1000 should behave like that, but it just sinks in really badly.

The issue is not just it kills immersion during replay (although that is quite annoying to me as well) -- the biggest issue is that it changes the point at which the plane registers as 'touched down'. It's something like 2-5 feet lower than what it should be because the wheels sink in too far. It affects the flaring point, the amount of speed you bleed off, how far down you touch down on the runway, etc.

[Will the A350-900 have the ULR variant and the -1000 have the Project Sunrise variant?]

Correction, apparently the -900ULR has software modification to add fuel at the expense of forward cargo capacity, while the Sunrise -1000 will have an extra fuel tank.

[Will the A350-900 have the ULR variant and the -1000 have the Project Sunrise variant?]

As title says, want to do SIN-EWR-SIN and SYD-LHR-SYD with the A350-900 and -1000, ideally. As I understand, both have an extra fuel tank with the -900 getting a ULR designation while the -1000 doesn't get any special designation, but gets extra range.

Super excited, very glad both winglet types are also being done on the -900!