Trackpoint does work, there is an issue with the touchpad and not releasing it's click so I just disabled it and put the trackpoint in imps (since that's all I use).
I read the same reviews on the T470P screen even the 2560x1440, I was worried it wouldn't be bright enough but on a night it's too bright so I dial it down to 40% or so, during the day rarely need to go over 80% even with the sun in the window behind me, the anti-reflective coating is good.
The XPS15 had deeper richer colours but the T470P has a damn fine panel and for looking at text I preferred.
FWIW, I went for the 256GB SSD and I wish I'd gone for the 512GB but other than that it's a truly stellar little machine.
Even get good battery life (I went for the 72whr and 6 hours under use is about fair (though that will drop rapidly if you actually hammer the battery, 35W processors on a 72wh battery..).