If you've built your character well, that should be it - they should be able to easily overcome any obstacle within their specialization. You need a party because everyone specializes in different things, and because one fighter can't stab all the baddies at once.
And then we get the million threads about "my specialized character can't do anything outside his specialization".
Personally I feel that a base of 50-50 against same level opponents is perfectly fine,
One of the goals of this edition is to reduce the rocket tag combat, but it seem that some of the people requiring higher to hit base values want exactly that.
"I win initiative, the enemy get to do nothig and I win the fight."
For them it can be fun, for me it is annoying and boring,
Well if you want high accuracy but longer combats you can just increase hp val-
"Enemies have bloated hp!"
Lets not even get into what happens to the jokers who run around specializing in the save/lose magic and are wanting crit fails on a 15+ from the bad guys.