We are currently running a test with Gain Matching.

If you are in the test group, you will see that we've moved the original vs. master comparison to the top right. More importantly, you'll notice we introduced a toggle to increase the loudness of the original to match the master. 

The original is the LUFS readout we get when processing, but since we haven't mastered the full track at this stage, we can only tell you the target LUFS value of -14db. When the mastering is complete, you will find your final LUFS will be within a range near -14dB but not exactly every time. Depends on the track.

We hope that this new free addition to mastering improves your confidence in the tonal and dynamic changes happening to the track and not "just making it louder".