For this form of fishing (with a sunken fly) the rod is no longer a shooting machine but a receiving post, with super-sensitive antennae, capable of registering immediately the slightest reaction of the fish to the fly - Charles Ritz, A Fly Fisher's Life
First off, I hate weight!! Be it wire or beads (really hate beads) I try my best to avoid it. Granted, there are times when it is necessary especially in the cold, deep flows of early Spring when nothing is hatching. When fishing the EB or the Millers under these conditions the weight is built into the fly. When fishing the Swift it is almost NEVER built in but attached in the form of a micro shot a foot or more above the fly. Why is that? Most of my Swift fishing is done below Rt. 9 where the river is more fertile and produces more weed beds than above Rt. 9. Weighted flies will pick up weeds. When fishing a fly and shot combo it's the micro shot that will pick up weeds as the fly rides just above the weeds which is where you want it. When fishing the Swift I'm almost always fishing some kind of emerging pattern micro shot or not. If I see surface activity starting it's easy to ditch the shot and fish the fly higher in the water than yanking off the bead head for something more sensible.
Second, I don't like bottom dredging but know that it has it's time and place. This includes high sticking and/or Czech nymphing. I find both forms to be situational: a nice run that's within 10 feet of me requires the above approach but I wouldn't apply the same technique to most situations like I've seen over the past few years. Remember, you spent big bucks for that long, lightweight casting machine and I don't believe it was meant to be used like an ice fishing jigging rod!
Third, I live for the Dry Fly! In 2009 I fished the EB from Memorial Day through Labor Day without going subsurface once and did very well and it's been pretty much the same since then. The same goes for the Millers. In fact, I enjoy dry fly fishing on the EB and the Millers (and the Squannacook) more than on the Swift. Why is that? The Swift, especially below the Pipe, has rising trout all year long and I've done well with tiny flies but I know that I'm floating over MANY rising trout on every cast. Many will refuse my dry on every cast for one reason or another but then one takes it. One gets the feeling that its more of a game of chance or whether or not you got there before anyone else did to have the best position. On freestones you are not going to have the concentrations of fish like the Swift. It's going to be YOU vs.THE TROUT and you have to not screw up the cast or drift because some dumb brookie two feet below that wise old brown isn't going to save the day for you. It's a different game and I like it! My favorite dry fly stretch on the Swift is_________. Not lots of fish but enough to keep me occupied.