There's an argument to be made for "simple martials, complex wizards" in the case of players who are new to D&D or tabletop games in general, where managing a spell sheet would be a little daunting with like 300+ spells available, but that argument expires the minute your new martial players are comfortable with the standard fighter/barb/monk/etc. and decides "Hey, I want to have more choices and do cool things with resources like spellcasters get to."
At that point, I think it's fair to offer players the choice to rebuild their characters with new frameworks, including the Advanced 5e martials. Laserllama's homebrew classes also tend to be well-balanced while offering good options for play, and the martials are no exception, although ultimately, most homebrew options with a modicum of effort tend to fall within the power range the published options give, considering 4E monk and Twilight Cleric are both considered AP legal.