The solution for the action economy thing was offered. Give the warlord subclass a feature that allows them to forgo using their extra attacks and instead give an ally an attack. A bit like beastmaster ranger (in some version at least!) does with their pet. And it has a benefit of making the warlord not a total wimp in combat if they don't have their allies with them, as then they can just use the extra attacks normally then. Also an capability to grant advantage on allies in certain conditions doesn't seem like something that couldn't be baked in.A couple of people have made suggestions, but in essence, the BM fighter only has a few dice to perform maneuvers each short rest, and those maneuvers are relatively minor and don't scale well at all.
The "lazy lord" was an edge case only really made possible by a splatbook, and isn't indicative of warlords as a whole, but the ability to attack an opponent and grant effective bonuses against it for example is something that a warlord should be able to do regularly. The issue is that as a Fighter subclass any bonus-granting actions are having to compete not just on a 'class power' economy, but also the action economy, with the fighter's monster attacks/round and other directly offensive capabilities.