you missed the most important 🙂
1. type of antenna (V aperture and H aperture, gain, backlobe)
The power is mostly used when it appears that you are covering the intended area with a very strong signal. There is no need to provide -60dBm in average in the cell, with -70dBm at the cell border.
By decrease the power by 10dB, you have -70dBm in average and -80dBm at cell border, which is acceptable. Of course, you must ensure the indoor coverage is not impacted (check TCH traffic after power reduction)
You can also decrease power of indoor sites, because you can’t play around with tilt or height. To avoid exposing surrounding people too much and to avoid overshooting outdoors.