I'd like to see what most people want to see, better regional play.
1 Airport is really enough for a whole region. Why not have an airport zone, like in simcity 2000. Computers nowadays are powerful enough to generate a nice airport I think
And ofcourse those stupid commute times.. and maybe smarter sims, dont take a very busy road if the highway is 2 tiles further away. And with that, I want to see ofcourse see sims drive further then 2km.
And maybe this isnt suggested yet, but I would like to see people actually go to beaches on hot days! If I create beaches now, and I want a nice boulevard with shops and everything they will always have low customers because there is no traffic at the beaches. Maybe a real tourisme mod can create is. More hotels on the boulevard