The Disco Sport is getting a slight rear end makeover for 2019, so I would suspect the D5 will get a few tweaks for 2020. Now that the Defender is looking to be a chiselled box, more like an evolution of the D4, I think people will not care as much about the design of the D5.
I had wondered in the past if LR thought there would only be room for one vehicle in their lineup with a chiseled, off road-ish look--and the Defender was going to be it--and that's why they softened the looks of the D5 so much. I still think they **** the bed on the timing of it, though. Having that hole in the lineup of a storied, off-road brand for this long isn't good.