Power does not have any thing to do with length neither does sensitivity
Congratulations...you've just rewritten classical mechanics. If you want a longer rod because you like novely and you want to own and try something new, then great. But you can't justify that with physical proof. Longer rods have greater mass and introduce many more dynamics into the equation if you want to have the same power and sesitivity as shorter rods. In the Middle Ages longswordsmen wielded their weapon to batter, not to thrust and parry. In WWII the Mitsubishi Zero was the most manoeuvreable aircraft partly because it was tiny. Big=unwieldy. Shorter=agility, accuracy, manouvreability, less strain. Sure, you can develop some proficiency with a longer rod but at great physical effort.
With regards to weight, this is not really an issue if one is using a properly balanced outfit and balance to a great extent depends on the placement of the reel seat on the blank, counterweights in the butt (of the rod, Gavin) and the weight of the reel.
Balance doesn't obviate the problem of weight or work. Bigger rods have much more travel that has to be regulated (conciously or otherwise) with counter effort. Because of the law of conservation of energy, the distance travelled by most of the rods length has to be equalled by the great force exerted on the very small part behind the fulcrum. Lets not even get into angular momentum and torque.
Yes, longer rods cast far. Into open water. What percentage of time are maral caught in naked open water? Small. Most are caught near cover, rocks, stumps, etc. To get to this you need accuracy. Try writing holding a pencil in the middle.
Get a long rod for fooling around, getting snags, tiring, and saying "mine is bigger than yours". Get a shorter rod if you're serious about fishing, 7ft being the outer limit for maral.
For once can you please can the sarcasm.
Me? Sarcastic? I'm about as sarcastic as St.Francis of Assisi. Please CC, I'm just a splinter as you slide down the bannister of fishing knowledge, so have compassion.