The biggest advantage of dual path is that it provides ful telemetry for both receivers and allows you to use the EXT port of the secondary receiver (assuming it's free) to connect a second telemetry device without adding hubs, etc. There are no problems with dual path but rather the way that the CB200 uses Rx2. The CB200 will never even look at RX2 until Rx1 has almost completely failed (failed to receiver 14 consecutive frames or Q < ~14%). Also as soon as Rx1 receives another frame it quickly switched back to Rx1, even if Rx2 has a nearly perfect signal and RX1 has a really poor one. This basically means that unless Rx1 completely dies, Rx2 can't really work significantly better than Rx1.. Also when connected to a CB200 Rx2 is almost never used and doesn't even really improve antenna diversity.

One thing about Dual path is it prevents you from using the wireless trainer interface as that requires one of the transmit RF sections and dual path uses both.. If you aren't interested in the wireless trainer interface then dual path is great. As far as I can tell a clone or secondary receiver connected to a normal receiver via a PPM link seems to make better use of the secondary receiver (or clone) that the central box does. This is really just a firmware issue with the central box and I'm sure they can (will) improve this significantly but as it is now it's not that great.

Since I like to use the trainer interface to allow others to fly my jets I prefer a clone connected to a regular receiver via a PPM link.