Maybe be able to buy a repair shop to repair stuff on on your truck for cheaper... maybe you have to hire a mechanic?
I can say it’s pretty weird when the gas station (which must require some permission due to fire safety rules)
appears when you upgrade your garage, but the mechanic shop (some rules are present, but not as hard)
don’t 
. Even the garage interior suggests it has more uses beyond only parking and sleeping.

— yes,
Caterpillar engine in Europe

.
Again, it reminds me
Hard Truck 2, when you can deliver fuel (which can easily explode in this game) from the start of your career, but can’t hire drivers anytime you want — for doing it, you must win licenses (which expire in several minutes) in a race with cargo or on a circuit. Also, the die-hard fans of this game often trash
*TS for unability to meet the hired worker on a road (in
HT2, the hired drivers are marked by the company logo on their trucks). I think even if it can be done, it must be a pretty rare event in
*TS due to sizes of their maps, especially compared with
HT2.

I... think... the repair shop in your garage can be the one of the easiest things for developing. Much easier than adding new weather modes (like fog without a rain) or making the seasons change. But something holds the developers from doing it. Maybe, they forgot that not every garage have a nearest service station as close as one in Farmington or Istanbul

.
As for falling leaves... All the new trees make a noticeable FPS drop, if you are in the dense forest. Imagine what will happen if every leaf will have its own life

.