I remember the great Warlord Wars of 2015 (long stare off). I remember two big problems with the warlords that got bandied around the first time.
The first is that the belief that a warlord who is simply attacking isn't being a warlord; a warlord should be commanding allies and granting bonuses every round. Most of the earlier debates hinged around things like 4e warlords having commander's strike as an at-will power, thus assuming a 5e warlord should have the ability at will as well. That debate spiraled into how a warlord should track resources for his abilities (comparable to spell slots, ki points, or martial dice) with nobody agreeing on how, how much, and how powerful the warlord's powers should be. Some believed they should rival a cleric in raw power (being able to use a variety of abilities eventually equaling 9th level magic), some believed a more buffed battlemaster (limited powers, keyed off martial dice) would do fine. Another group vouched for a warlock-like "very limited list, but nearly unlimited use" method. Others I swear had no idea and simply wanted warlords granting free attacks every round to their allies without cost.
The other was exactly what a warlord should be doing. Granting free attacks, allowing casters to additional spells/round, healing wounds vs. temporary hp, healing statuses like blindness, poison, fear, charm, and even death, and buffing everything from AC to skill checks. Since there was never a consensus on how a warlord should track resources (aside from a very visceral dislike of a "slot" system) there was no way to gauge what strength a walord's powers should rate as.
There is no answer at this point that I think WotC could give that will satisfy even the most ardent of warlord supporters at this point. The fact the community hasn't even been able to create/rally around a DM's Guild/OGL version (and WotC has literally given you everything you need to make one at this point) is telling of that. Until there is a bit more concensus of how a warlord does things and what exactly it supposed to do, I don't think there will be anything more than these random outbursts of warlord threads ever-so-often.
Oh, and its time to bring back the subforum again.