No more butterfly keyboards please
Also add some sort of haptic feedback to the touchbar.
Before I got my 2018 I had a 2015 MacBook Pro and don't find the keyboard to be inferior or superior to the old gen.
(However, I do sometimes work on flights after they've dimmed the cabin lights, and a laptop keyboard as loud as the MBP I heard in that Starbucks is a dealbreaker for that use case.)
It still has all the issues it had previously, just that some (not the key travel or separation issues) are mitigated. The keyboard remains extremely unreliable compared to the chicklet keys, or the magic keyboard's.