I always thought it was my computer set up that caused the ground handling issues. Mine lacks rudder pedals, so I auto coordinate my yoke and rudder, which has caused issues with other planes in the past.
I personally believe the developers did an amazing job with the TBM, they are just constrained by the sim environment. The MU-2 is another example. I've flow those in real life too and its nearly impossible to replicate the actual aircraft to a tee in the sim. Now Tom came very close, but he's still working within the confines of LR XPlane.
Im very grateful they continue to develop amazing aircraft for this sim.
But yes the real TBM is a very nice bird to fly.