Heal and toe under power? Is that some drifter move?
No, you don't get it. You don't have to heel and toe to keep the car stable while making a shift under power. This is useful in turns with both decreasing and increasing radius.
You can argue about weather a paddle shift dual clutch is a manual or an automatic, it's 1% of the market.
It's a growing segment, and it will continue to grow as true manuals continue to fall off.
Most slushboxes remain slushboxes. They are sitting in top gear at a red light and don't even start to downshift until you gas it and intake vacuum drops, computer controlled but still the same old.
Well, no. Nobody has been basing transmission control on vacuum in a very long time. We've been using torque estimation since the nineties.
Don't even start about engine braking through a torque converter.
Why not? It's only 10% less.
The one thing no automatic can do is anticipate the corner, even the automatics with shifters take them as 'suggestions'.
When you are shifting manually, there is no suggestion. It just does what you asked for.
Shift kits are nothing new.
Shift kits don't do what you seem to think. They just change shift characteristics, and they don't exist any more... that is, not for new designs. The new slushboxes are too complex to be operated by a simple control system. You would destroy them doing that.