I'm of course just speculating. But my speculation build upon how Porsche usually do for facelifts. Look at the updates from Panamera mk1 -> mk2, 997.1 -> 997.2, 991.1 -> 991.2, Cayenne 958.1 -> 958.2 and so on. The updates to the facelift has never to date updated the panels in the interior nor any major changes to the exterior. Front and rear lights and front/back bumpers changed on exterior. For the interior it has been updated PCM (still within the original .1 frame), new steering wheel, some new interior colors, and so on. But e.g. the instrument cluster and general cockpit layout has stayed the same.
So a instrument cluster change for the Macan and also a change to new gear lever, completely re-design center console with touch buttons, etc, will not happen in Macan 95B.2 (if it will come). These major re-designs to the interior is probably saved for the "new" Macan that build on the MLB platform (new A4, new 2018 Q5, etc). When the new macan will be introduced on this new platform is still a big questionmark. Maybe in 2019 as MY20? Let's hope for earlier, but since the Macan sell so well in it current setup, and that it also got the new PCM for MY17 and new LED headlights (kind of a mini-facelift) means that they can push the next gen Macan a few more years ahead.
I suspect the next Cayenne will come in at a similar weight to the Macan. Between that and the new Q5/RSQ5 there'll be pressure on Porsche to move the Macan to the MLB evo platform as soon as they can.
My SA even mentioned a couple of months ago that he doubted we'll see a faclelift for the 95B. I'd also guess that they're selling so many Macans it won't be difficult to make a business case for say a 5 year model life, rather than the usual 7
Sold:'15 Macan turbo: rhodium silver, red/black interior, 21'' turbo design, ACC, PSE, SC + stuff
'17 Macan turbo: White, red/black interior, 21'' SC, ACC, PSE, SC + more stuff