Now I know you know this...
The Base Paint is essentially the Foundation for the specific Tint. The Base "has" it's own set of specifications standing alone, but the addition of the Tints required to produce a specific shade of Gray changes all that. If one is to believe your report, which I do.
Selection of the particular Base can vary, from pure "Flat" to Satin.
The Base mentioned is familiar to you. Certainly the idea of a "Base" and specific "Tint" should be. As far as the mentioned Base's inherent properties, the list of benefits of which you have already mentioned before pretty much assures that as a Base, it's going to do any specific Neutral Tint justice.
So you see, at the end of the Mixing process, the end result should be as specified. A N7.5. < Dover Gray>
The Poster has the Lumen output. And a simple need for contrast improvement. Small screen. A Simple, inexpensive solution that's easy to apply, and one that without any preconceived expectations will deliver a pleasant surprise.
If the PJ was different, and the goal more lofty........