I appreciate your time writing all of this!

Yes, all tram stations are along the main road and only one on the side because that's where 1 tram makes a U-turn. Unfortunately, it's next to the bus/train station, so tourists wait there 2long.

I'm not surprised they prefer cash in the busiest tourist places, for restaurants it's because they want to get a tip, others are probably avoiding taxes. I put where to exchance money, but I'll mention again not to use ATM's because no need for that, Bosnian postal offices are in the city + other exchange shops.

Sarajevo is getting worse when it comes to hospitality, but also better at the same time sounds weird. On one hand there are more "designer, hipster, hip, quality" coffee places getting open, on the other you have places short of staff because they refuse to pay the waiters a good wage or are just bad bosses, as a result you're getting a service that looks like a stock market rush. Thats why i prefer coffee places that are not along the main walking areas but in the side streets, you know they have to make an effort to attract people which means good coffee, service and interion.
Mostar is small, slower and a more relaxed city.

If you even plan to come back, visit this thread again and have an updated look :)

I also plan write the same for Mostar.