Tony Vargas
Legend
I question that 60%, but OK, if you're counting /everything/ not just uniquely-Warlordy or support-oriented things....I think most people who want a warlord agree that currently, you only get about 60% of a warlord, no matter what you try to do in 5e. You just can't get a whole warlord, yet.
The PDK does two warlordy things, it restores hps via inspiration (1/rest, in a trivial amount), and it grants an ally an extra attack (at 10th level, 1/rest). The Battlemaster can do three things from 3rd level, but only 2/rest. Contrast that with a 1st level 4e Warlord, that, even coming from a game where the most versatile and flexible classes don't hold a candle to their 5e counterparts, can do five: two at-will, one 2/encounter, 1/encounter & 1/day. Is that 3 out of 5 where you're getting 60% for the Battlemaster?PDK suffers the same issue as the Battlemaster. It's only about 60% of what a Warlord does.
At first level, even in 5e with 'Apprentice tier,' just about any class gets something vaguely class-defining it can do, and do all day. Fighters get their Style, Casters get cantrips, Monks unarmed attacks, etc. No Warlord class means doing nothing remotely Warlord-like until 3rd (for an archetype) or 4th (for a feat). In 4e, the Warlord got at-wills, so it could do something warlordly every round, from 1st level on. It was 100% Warlord in play, not just in concept or in theory or for the sake of argument. A PDK, at 3rd level, has one warlordish trick, 1/rest. A Battlemaster can choose up to 3 but only use em 2/rest.Sure, you can make a Battlemaster that grants bonus HP, grants attacks and grants movement. All very warlordy stuff. But, at say, 8th level, he can only do it 5 times per short rest. If you presume 10 rounds of combat per rest period (not an unreasonable assumption), at best he's doing warlordy stuff half the time. That's at best.
For easy numbers, lets assume a 20 round day (a 4-encounter 4e day averaging 5 rounds, or a 6-encounter 5e day averaging a little over 3), that's estimating pretty low, which favors the 5e sub-classes, and we can assume the typical 2 short rests. The PDK plays Warlord 3 rounds out of 20. The Battlemaster, doubles that 6/20. Not looking good.
Then consider the range of possible characters. A PDK offers no choices - you get 2 warlordly abilities, one at 3rd, one at 10th. The sub-class represents one possible warlord-lite. The Battlemaster has 4 arguably-warlord-like maneuvers. He chooses 3 at 3rd level, so, if being as Warlordly as possible, that means there are 4 possible characters, based on the one maneuver each doesn't choose. Contrast that to even a 1st level 4e Warlord: choose one presence out of two (2 possibilities) * two at wills out of for (6 possibilities) * one out of four encounters (4) * one out of four dailies (4) = 192 possible combinations for your 1st-level Warlord.