this is THE key problem.
roleplay can good or bad, depending on group and you, at any level, that is what you make of it.
But, mechanically, low level characters are simply boring as hell.
Maybe wizard should know 10 1st level spells and have 10 1st level slots and 10 cantrips. you would probably still default to 2-3 cantrips and 2-3 1st level spells most of the time, but it's fun and interesting to have contingencies.
maybe every martial, depending on class could know 3-5 maneuvers and have 5-10 maneuver dice right from the gate.
That would make combat interesting.
I find playing characters that have fewer options to overcome obstacles with spells or class features to be more interesting because you have to think outside the box more often. Your "problem" is my "feature".






