What you discuss is selection bias. You expect them to be copying 5e so that's what you see.
The thing is, I’ve read a few interviews with Paizo staff and they get stuff wrong when they talk about 5e. Like, embrassingly wrong. Recalling something the half read on a message board six months back type wrong.
If they were actually looking at 5e, I think things would be a lot smoother. Resonance seems like the most awkward way of implementing a magic item attunement, a more complicated version of 4e's daily magic item rules.
Look more at the evidence rather than what they say.
This is for the old timers, so maybe the younger ones won't understand this...
Glen Larson to his dying day denied that Star Wars had any impact on Battlestar Galactica or Buck Rogers.
The entire world knows that's probably blatantly untrue. It's NOT what he said...but what we saw. Sure, there were many differences as Glen Larson would have pointed out...but the timing (soon after SW and when SW was big) and the environment (big ships with fighters buzzing all around having fighters shooting at each other and big ships...fighters taking out big ships...etc) screamed it was taken from Star Wars.
Someone can say all they want...no...I didn't do this...but when the evidence points strongly that they DID take something...well...you can either choose to believe them or what the evidence shows.
There's no such thing as parallel development normally. that's normally a bunch of BS. When it occurs in the tech world that means that one side got wind that the other side was doing something. They get a little information on how that works and then start trying to do the same thing themselves. First one to the finishline...wins.
However, when it is this much delayed...it's not even parallel development...it's straight up ripping off an idea and using it as one's own. Ideas that are THAT similar don't just happen. That's not how it occurs in life most of the time.
In movies, and much of the rest of the entertainment world, it's pretty obvious when it occurs as well. Now...sometimes ideas DO happen in parallel...but the way one can tell whether they did or did not is in the details. The MORE items that are similar, and the more similar they are...the far more likely it's a copycat.
You don't just get this many items that similar between games and call it parallel development. It does not happen. If it were far more general ideas...maybe...but with the specifics they've released just this far...no way this is parallel design without them taking ideas directly from 5e. The evidence just keeps mounting up against that.
5e is the Big thing right now (8.6 million gamers in the US...probably at least a million more world wide so over 9 million gamers as per the ENWorld article...yikers...5e is BIG now) and so of course...everyone...probably even Pathfinder...wants a chunk of that pie.