You're just going all over the place... making or considering changes without much reference to what that will actually accomplish.
One 5'10" person might be very different from another.... IE I'm now 5' barely 9" (in the morning...) BUT I can virtually guarantee you that my legs are well longer than yours...
...Long legs... I know my 'riding' inseam, and that helped put in a very close saddle position, from which I fine tuned...
SO, any one who says you're saddle is toooo High or Toooo Low, without a reference to your body dims, absolutely does NOT know what they're talking about...
Saddle position, for height & 'setback' is the 1st real important setting - and for that, there is a range which can work. not just one place...
Then everything else in setup for stem/bars, goes from there...
if you haven't done your 'riding'/cyclling inseam - start there...
here:
easy to do, barefoot, use a hardbound book about 3/4 to 1 inch thick, do 3 times to make sure you get a non-varying number - I make a light pencll mark on wall when book is in the correct position - very firmly up your crotch.
then the resulting number can be used to get the ballpark seat height, which can then be tuned...
report back
Ride On
Yuri