I guess it all depends on your GM and group.
In the Carrion Crown game I am playing in we have a 20 point build and average hit points.
Our Aasomar paladin of Iomedae has a 14 Str and uses a longsword and shield .. My character, an Aasimar a cleric of Iomedae has a 14 Str, 12 dex, 14 con, 14 int, 14 wis, and 14 cha The paladin and my character are brothers
Our fighter who is using two weapon fighting has a 14 St and 15 dex.
We also have an Alchemist, a ranger, and a wizard. I don't believe they have their stats up in the 18s or 20s.
We are getting along just fine. I know it helps to have a 20 point build over a 15 point build. Also it helps to have 6 pcs instead of 4.
But our party for the moment is doing just fine. We are just about to finish Trial of the Beast.
I enjoy having a character that is a bit more rounded and flexible rather then hyper specialized.
but I'm sure everyone has an opinion.