Would love for melee characters to be more like seasoned warriors who carry 3-4 weapons and have the option to pick the best tool for the job. It would also make loot for those characters more interesting more often and might make picking skills a bit more challenging in terms of deciding how specialised or versatile you want to be. Also, enemies could be made a bit more tricky without simply making them have higher HP and damage.
This is how I set up and play my melee characters and party members in the Pathfinder games. D&D 3.5e made this possible. It's yet another way in which 5e sucks.