What will weight adjustments do in the KE4 woods and driving irons?
Weight adjustments will change swing weights, of course, which changes the feel of the clubs. That’s the obvious answer. Also, if you add weight, the shaft becomes more flexible and if you reduce weight the shaft becomes stiffer. For every 2 grams you change the head weight, the shaft flex changes by approx. 1/10th of a flex. Center of gravity in the head can be affected too, but due to the small range of change you can actually make, that aspect is minimal. In the woods, since the weight is positioned lower and more rearward, adding weight can produced a slightly higher trajectory. Reducing weight may reduce trajectory slightly. In both cases, adding or reducing, the effect will most likely be small.
Weight can will generally effect the feel of a golf club for most players. Because every player is unique, changes may or may not effect the ball flight.