I think it woudl be great if they added an option to the HPFOREST node to automatically generate and visualize a 'representative tree' from the many trees that are assembled under the hood. This would take way some of the black box nature of this technique and there already is reserach on how best to show your most representative tree:
http://onlinelibrary.wiley.com/doi/10.1002/sim.4492/abstract
http://www-stat.wharton.upenn.edu/~edgeorge/Research_papers/forestCART.pdf