Here are some ideas...
- Big road terminals. Some cargo terminals can get very busy, bigger terminals would be useful. Larger road vehicles can be used, but bigger terminals would be nice.
Multipurpose road terminal. A terminal for cargo and passengers. Useful in small villages. Busses could also carry mail.
Oil Tankers. An oil tanker that stops at Oil Rigs could also carry a few people and some mail.
Buying Industries. Companies can buy industries and make money from them. Players could also shut them down (annoy the competition)
Intermodal. Road vehicles could board ships or trains. Would allow trucks to reach far away terminals, for example, for valuables or mail, although this could be done with trucks/terminals at each train station.
Depots require goods. Vehicles can only be fixed if the depot has the Goods.
Real Supply/Demand. It would be more interesting if there was real supply and demand between Cities (and Industries). For example, at City A, 10 people/cargo want to go to City B and 20 people/cargo want to go to City C.
I havnt played TTD for a long time and im not sure whats new in OpenTTD. Ive only just noticed that steam trains take a while to stop (when told to stop), is this new?
Oh, and thanks to the people who have developed OpenTTD