There is several things wrong with TTDL but most of those problems were all because of technological limitations of the day. Locomotion has several good things(from what I can see in the demo) but they shoulda just taken TTDL, update it completly and put in all the new stuff, such as cliffs, water above sea level, nifty bridges, subway lines(I think) and so forth
I'll probably pick it up if it isn't the usual new release price (IE $60+)simply because I can't get TTDL to work, and that gets old once you reach that stupid vehicle limit