[punman]

I am getting 30 Tropheus Kiriza (1.5- 2 inches) this weekend.
180 gallon tank 6x2x2 feet
Below is the set up when it was for Foai sibwesa and cyps.
Is it too open for tropheus? Shall I add more rock piles?

 

[NorthShore]

I'd leave it as is. You want to be able to see all your fish, especially during feeding time. I'd consider adding more, maybe even another rockpile, but I'd wait at least 3 months.