Colorado, you are being a very good sport here. You've stuck with the conversation despite its sometimes unpleasant message and sound like you are genuinely interested in hearing what people say.
There are four things to work on, and one misunderstanding to fix.
1. Your weight is over the backs of the skis. It needs to be over the fronts. Tighten up your boot cuffs, and stand up taller, a LOT. And to get forward, bend your ankles forward. That little joint will bring everything above it forward, all of you up to your head. Your lower leg muscles will be involved, holding your shins forward against the fronts of your boot cuffs (think: shin-tongue contact). Use this ankle action to keep you hovering over the fronts of your skis as you ski. --Do not do anything that can be called "sitting." Those hips need to be high. If you've been boarding for years, you can learn to balance on two skis with a more upright stance. Hold your hands somewhat higher and more forward, as if carrying a cafeteria tray. It feels weird, but do it anyway. Look at videos of very strong skiers. They do that. Those hands and arms carry some weight too, and this puts your arms in the right place for pole plants, once you get more dynamic with your turns.
2. Ski into counter. That means after your turn starts, allow your skis to turn more than your upper body. This allows all kinds of good things to happen.
3. When you edge your skis now, you are doing it by leaning your entire body sideways. You need to lean your legs sideways but not your torso. One way to conceive of this is to lean your upper body sideways out over the outside ski. This will direct pressure/weight to the outside ski. That's good; the outside ski should have almost all your weight on it. Right now your inside ski is doing way too much work because your whole body is "leaning inside" (banking). The inside ski needs to be light, not holding you up.
4. So how do you edge the skis without leaning your whole body to the side? (a) First, lean your ankles to the side! Ankles are the hidden secret to good skiing. Everything starts at the ankles. Bend your ankles down toward the snow in the direction your want to tip your skis. (b) After you start your tipping with your ankles, allow your hip to move inside the turn ... keep the torso above it upright. Hip action!
5. Now for the misunderstanding. It sounds like you believe that the highest edge angles happen when your skis are pointing across the fall line.
Originally Posted by Colorado
....I'm apexing at close to perpendicular to the slope, just like you do when doing C turn drills, right? The intent being to turn back up the hill.
Nope. Apex happens at or near the fall line. When you hold onto your edges, and even increase them after the skis turn across the hill, you will ride the skis back up the hill, but this is a drill. Its purpose is to feel what carving skis feels like without having to start a new turn. Repeat: it's a drill. I trust you that you can feel your skis are carving when you do this; it's after all what holding onto the carve after the fall line is all about. But you are linking drills together, not making carved turns. Instead, begin to release your edges just after the fall line when you link real turns and move down the hill. Granted, it feels real good to carve the way you are doing it. Seductive, really. But so much more is possible.
Summing up.... You'll have much more control of your line and your skis if you get out of the back seat so the fronts of the skis can do their work, let the skis turn more than your torso so you end up facing more downhill than them, lean out over the outside ski instead of leaning in, and start releasing right after the fall line. You won't be at the mercy of your skis any more, wishing for empty slopes. You'll be in charge. You'll still be going fast, and you'll still be carving, but you won't have that long static part where you park yourself on top of the skis and ride them around. The coolness factor will result in accolades from the chair. You're missing some good stuff right now. So work on these things on your own and take that lesson!