Actually iOS is still limited and can’t show Wi-Fi strenght in dB. Wi-Fi scanner for Mac OS (or other utilities) does the job.

We might complain about the SSD not replaceable or upgradable by the user on MBP with the Touch Bar. It wasn’t enough the soldered RAM: http://www.macrumors.com/2016/11/15/macbook-pro-touch-bar-non-removable-ssd/