If there is to be a SimCity 5 here would be some improvements

1: More Diverse Roads Dirt, Gravel, Paved, Cement,
All roads and streets can curve

2: Improved Highway Systems such as
Two Lane, 3 Lanes, 4 Lanes, Expressways

But I do not see SimCity 5 as being important
But for folks like me who like non violent strategic simulation games
it is a dissapointment when people like me are swept under the carpet

some of the best games have ended

MYST
Roller Coaster Tycoon
Sim City