I have casting rods of 6, 6.5 and 7 feet. All things being equal, the longer rod will cast a little farther but not as accurately as the shorter ones. Longer rods can be useful to hold some extra line off the water, to prevent or reduce drag, and to provide more reach when flipping etc. But, an extra 6 inches won't change the hook-set much, in my opinion.
Don't believe the story that you need a leader with braid. It is an old-wives tale put out my mono manufactures, to sell plastic line. It is pure "Hog Wash" in my opinion.
If you are using spinners, spinnerbaits, crankbaits, jerk baits, etc. the fish is attacking the moving bait. If it had brains enough to know that the line was a danger sign, it would know that metal blades on a piece of wire aren't eatable...hahaha.
If you are using live bait, weightless Senko's, drop-shotting, or other so-called finesse techniques, you still don't need a leader. Fish aren't afraid of the line, so long as the bait falls free and natural. Fifty years ago we fished with black cotton, nylon and rainbow Dacron line and caught as many fish as you can catch today with Fluorocarbon which is supposed to be invisible. Fish will avoid all baits, regardless of the line type, that are moving unnaturally. This happens when the line is pulled by the wind, waves or currents. Fly-fishermen call this effect "drag."
Garry2rs