My guess is it's hard to stay relevant or popular in the extremely congested Apple/tech vlogging YouTube space so some of them resort to increasingly inane and ridiculous rants to attract views. Click-bait essentially.
The standard 7 is near perfect for me, which is just as well because I intend it to last me at least four years.
Improvements I'd like to see are:
1. More use of Taptic feedback throughout the OS, such as keyboard entry, but there are many other places and ways it could be used to make the phone feel more alive.
2. Make notification centre easier to access. Reachability helps but it's still slightly annoying. Other places or methods it can be called are to the left of the widgets page or by swiping up or down on the widgets page.
3. Silent switch can be difficult to operate in certain cases and should be removed in favour of software controls. A button on the control centre could control this functionality.
4. Faster lightning port/SSD. Filling 256 GB still takes a long time, though this is rarely done.
5. 1080p resolution in the 4.7" form factor, not that you'd notice it that much and this could reduce battery life a little but it could look a little sharper.
6. 3 GB RAM in the 4.7" to match the Plus.
That's about all I can think of so not bad and it's serving me well.