UngeheuerLich
Legend
Nooo.... i was trying to prove a point. Now Minigiant will point to your post and tell me that you propose the warlord to be just a subclass. :/Warlords were a niche class in 4e (sorry, but you know it's true) and they were expressly designed to work with that system, with its emphasis on role over class. 5e is designed on the idea that each class is significantly self-contained. I'm having trouble conceptualizing a class that goes a lot further than the battle master does as a leader/support role, while still being good autonomously.
Other than that, I agree with your point. The warlord should be autonomly useful. This is why I propose adding more warlord abilities to the fighter. A fighting style that allows them to just use their second wind on allies and allows them to grant attacks to allies will go a long way to supporting the warlord style.
Many of the 4e powers won´t work well in 5e, because they allow tiny movements and positioning you need to track on the battlemap. Which is something 5e explicitely does not want.