disagreed. But there's an easy solution. If they think martials are boring to play at low levels - start the characters at level 5. then martials have 2 attacks (which is what they're essentially doing anyway) and instead of the game having levels 1-10, it goes from 5-15.
This solution has basically one huge disadvantage.
In fact, most build choices are made in the first 5 levels, meaning you would have to make them when creating your character.
It is also unfriendly to players unfamiliar with DnD.