Some manufacturers say they have more control over the action of the rod since each piece's taper can be specifically designed. Some years ago that wasn't the case. Pack rods were either too stiff where the pieces joined, or the whole rod was of poor quality. Times indeed have changed. Y ou don't have to.
Reels are basically line holders.
Most freshwater stream and lake fishing doesn't require big reels, nor sophisticated drag systems. As a beginner, you have to make some decisions. Now we're talking bigger reels. One that will take 200 or 250 yards of backing and a good drag system. Even if you rinse your reel religiously after every use, salt crystal will get where they aren't supposed to be and the reel will seize up.