Tony Vargas
Legend
one L&L poll I recall leading up to Next did ask respondents their favorite class, fighter came in comfortably 1st, followed by wizard, rogue, something else I don't remember and Cleric. (it stuck with me that Cleric was the only one of the Big 4 not in the top 4). Warlord came in middle of the pack. Druid may have been last - it usually is (it was my favorite class back in the day) - but I don't have a clear memory of the whole ranking.Not sure what you are saying. Are you saying Warlords were as popular as fighters during 4e? Because I don't remember that being the case (glad to be proven wrong).
I cannot think of another WotC poll or playtest survey question that asked about the Warlord. AFAIR, after the first playtest packet, no poll or playtest survey asked about any content introduced by 4e. (The very first playtest survey asked about a number of spells, all the 4e-introduced spells on the list got high marks and are in 5e, notably Healing Word.)