Back to alikocho's original post: I think all the obvious problems have been mentioned: kinks, height. Is it possible hop bits are getting stuck somewhere (quick disconnects, blocking your siphon tube in your kettle, etc?)
Also, faster isn't better.. unless you have a way to recirculate your wort, slow isn't bad, it's a good way to be sure that your wort has been cooled down to the temperature of the water you're using.
And Denny's right, the galvanic effect is almost nil for the amount of time you're chilling your wort.
I also wouldn't be afraid of drilling your kettle. Get a weld-less valve set up (or heck, put your own together from your local hardware store, it's nothing more than a 1/2" ball valve and yes brass is fine, a short 1/2" nipple, a 1/2" coupler and a couple of high temp o-rings), it's pretty darn handy and certainly safer than trying to siphon boiling wort.
With all of that said, without a pump, I think an immersion chiller is more efficient. You can whirlpool your break to the center so it doesn't go into your fermenter and clog up your pickup, and you can chill it the bulk of the way using tap water, and if you have relatively warm tap water like I do in the summer, you can take a pot full of ice water, set it above the in side of the IC, and run that through to chill it even more which you wouldn't be able to do with a CFC and multiple pumps, or multiple CFC's.
Me, personally, I use a CFC, the ability to do heat exchange is better than an IC. But I have two pumps, and I recirculate my wort and I get it well below the 80C mark for SMM->DMS breakdown within a couple of minutes. In order to sanitize it I run boiling wort through it for 15 minutes prior to chilling, and run caustic through it when I'm done, then sanitizer afterwards, then more sanitizer as I'm starting my brew day. But since you're not running wort through an IC and you can scrub the outside, it is inherently more sanitary. I also use the ice water method once I've gotten my wort down to the point of diminishing returns using tap water to get it the rest of the way down, even to lagering pitching temps. I also use my CFC as part of my HERMS, I use it to heat my mash using hot water from my HLT. I suppose you could do something similar with an immersion chiller but getting the coil around the thermowell and being able to stir it may be a problem.
Having a pump or two is a nice option, but until you have a better idea of how you want to use them in your system, I would hold off. As you can see there are many many opinions, and there's no right answer but the right answer that fits you, how you brew and the system you want to have. Get a few batches in with a valve on your kettle and using an IC (I do think this is your best option right now) and see how that goes, then see how crazy you want to get with the cheeze whiz.