That sounds to me like you saw scale combat in "2610" class. That's pretty much it these days for scale. There used to be slower moving classes, but they were never as scale as you describe either.

Frankly, RC combat will never look like a scale contest with streamers. It's more "stand off" scale than anything. And while scale performance sounds like a good idea, the reality is a bit harder to make happen. It's amost impossible, if not impossible, to actually write contest rules that would enforce it.

Also, it's worth noting that what makes a good "real life" fighter is not at all what makes a good scale combat airplane.

Of course, if you want to do more-scale-like combat with your friends, or as something to show off at an airshow, that's a different matter entirely. You can do a lot of things for fun and show that won't work in the long haul as a competition.