I'm not too sure about that.
Base capture was made more difficult and the bases were moved farther apart pretty much concurrently.
I think that is one of the main reasons the Horde is such a staple of gameplay. It's a (relatively) longer flight to the next base and the mechanics of base capture favor the largest number of participants possible.
If you watch the MA, Horde capture proceeds from one base to the next closest, to the next closest, ad nauseaum.
If many AIR bases were an equal distance apart and IF base capture didn't favor horde tactics to such an overwhelming degree, perhaps the fights would spread a bit.
As it is now, it's pretty hard to sneak behind the Horde and capture some base(s).
In the olden times, it was not that hard to sneak a base far behind enemy lines.
I think the way it was, closer bases with easier capture, led to a lot more fights overall and the fights weren't Horde v Horde.