With the Essence, we set out to make a timeless classic, focusing heavily on making bulletproof build quality so that they will bring you many years of enjoyment. Wireless standards are constantly changing, so we didn't want such a high quality product to have an aspect which could become obsolete in a short period of time (even the best current Bluetooth standard, aptX, is limited to only 352kbps, not enough for a lossless FLAC file such as TIDAL provides, let alone 24-bit).
We recommend using a relatively inexpensive Bluetooth receiver with an Optical audio out (so that you still take advantage of the excellent DAC). This way when wireless technologies improve down the road, you only need to replace the inexpensive receiver, not the whole system.
You'll get the best quality from your phone by using an Apple Camera Connection Kit (iPhone/iPad) or OTG adapter (Android), which allows your phone to be plugged into the USB input.