‘Too much force, too early’ describes when the power arrives, not what the loop looks like. The phrase on its own does not fix a shape. Diagnose it the way you would any fault: read the rod tip path, how much the rod bent, whether the anchor held, and where in the stroke the force landed.

• Convex tip path. Force applied before the stroke has travelled can bend the rod hard and bulge the tip path upward; the fly leg copies it, the loop opens and the delivery falls short.
• Concave tip path. Force applied unevenly, or a rod that straightens early, can dip the tip path instead. The fly leg then crosses the rod leg and you get a tail.
• Anchor and timing. Early force can also break the anchor loose or finish the stroke before the line has unrolled. Check those before blaming the loop.

So fix the force rather than a shape: smooth acceleration, the right amount at the right time, then a crisp stop at about 10:30. Then look at what the tip path did.

Source

From the CI Study Guide (2025) (PDF), the roll casting faults and Task 9; terms from the FFI Fly Casting Definitions (Convex Fly Leg).