I do rather think natural feeling zone rules might be an important part of it
I think they would have had to drastically change the structure of the combat rules to make strong 'zones of control' work well.
I'm not sure I'm following what we mean by 'zones of control' - actual Zones with that keyword? Threatened areas?
The control afforded to wizards is really relatively weak and often circumstantial.
Wizards obviously slathered a lot of conditions on their enemies, and could conjure zones, walls, & summon. A more oft-overlooked mode of control for them, though, was area interdiction, being /able/ to drop an AE in an area of a given size imposes tactical considerations on your enemies, sometimes whether you do it (or do it that effectively) or not. If it's an all-creatures AE, rather than an enemy-only, it imposes another dimension to it: closely engaging your allies in melee reduces the danger from the AE. It also increases the danger from your allies, especially if they tend more towards melee.
The 4e wizard could be pretty interesting to play, early on, and it's mutation into the Mage, in-line-with-the-classic-game-errata powering up it's spells, and general Essentials+ power inflation actually took away from that interest, making it less of a challenge to play well.
As for a warlord-like controller, I'm all eyeballs, roll 'er out!
Over on the 5e side of the house, Mearls is demonstrating his design process with another 1/3rd-Warlord Fighter sub-class as an example (at least it's not another witch - some may recall it being used as an example of custom-class creation in more than one edition), and it's set off the usual round of silliness. An off hand 'there aren't enough potential sub-classes' comment initiated a flurry of them - I collected, consolidated, and ended up with 16 that seemed pretty solid. ::shrug::
Anyway, two of them: a 'Marshal' that commands troops, and wrecan's 'Hector' concept would potentially be controllers in 5e, since there's no attempt to keep classes to one role, or even any formal roles. (There are the old informal roles - caster, healer, trap-victim, & meat-shield - of course.)
The Martial Controller Underground had a bunch of martial controllers, a few were Warlord-like. I might have a copy of the "soldier" which centered around formations and powers that keyed off them.