My theory, as I have read in some other Macbook pro launches before, is that the yellow tint to the screen and the dimness is possibly due to manufacturing variances of newly released machines.
In an old post of "Panel Manufacturer (2015 15" rMBP)", there are complaints of yellow washed out screens on the 15" MBP.
https://forums.macrumors.com/threads/panel-manufacturer-2015-15-rmbp.1887908/page-2
So I hope that after a month or more, the manufacturing will be settled down and the displays will come out more calibrated, white and bright!
What do you guys think? Is this a possibility?
I will return it and in a few weeks/months will try again.
But another thing is that the GPU is so underpowered that the MacOS application folder opening from dock stutters! Unacceptable!