I fail to see how it is a problem. People have the Warlord classes they want, through 3rd parties. Apparently all those "Warlords" are good to perfect. If that were the case, the only thing WotC could do is make their own version that people will criticize as not as good as the third party offerings. Want proof? Reading the fans in the forums here, apparently LU is in every way better than D&D. No contest.
I wonder how many Warlord fans are also WotC fans and really trust WotC to do it right. I doubt that it is a large population.
WotC's heart is obviously not in it, so pushing them to make their own version of a warlord is pushing them to compete in an arena they aren't interested in, hence they would likely fail to pass muster for the warlord fans' expectations.
What I hope happens, is that a 3rd party that makes a perfect warlord could try to get it published in a book to purchase, and then then work with the fans to encourage Wizards to adopt that publication as a 3rd party DDB offering.
I want people to have their Warlord. Wizards doesn't have to be the ones to make it.