Something to remember is the 622 & 722 are Dish Pro+ receivers. If your old receiver was a only a Dish Pro it could live quite happily on substandard cable. DPP equipment needs Rg-6 rated to 3GHz (most is not rated to 3GHz). It is quite possible that is your problem. Also don't forget any barrel connectors, and ground blocks need to be 3GHz rated. My father was once having a problem with a 301 that kept going stupid. *E kept sending him replacements.I think it was after the third, or fourth one they finely sent a tech to check over the system. It turned out to be a faulty DP34 switch when it seemed it was receiver problem.
I don't mean to sound authoratative here but in my experience (recently retired broadcast engr) there is really no such thing as RG-6 coaxial cable that is "rated" to 3 ghz unless it has actually been sweep-tested and comes with a certificate attached to the spool attesting to this. What there is, however, is some RG-6 coax around that has been marked/labelled as 3,000 Mhz (3 Ghz) cable, ostensibly for marketing purposes. That having been said, there is good coax and there is bad. At a frequency of 3 Ghz all RG6 (both good and bad) is going to exhibit very similar (if not identical) signal propagation and loss (attenuation) characteristics unless the cable is in some way physically damaged. RG6 Quad Shield cable is very good for use in cable TV systems where ingress radiation (ghosting) is a problem and is considered by some as a more ruggedized version of RG6 (it is after all larger), but otherwise there is no use or requirement for it in DBS (satellite) distribution systems.
The coax coming off the spool in the E* service van is very likely to be better quality than what you'll find at your local Radios Hack store and certainly a properly installed connector (including snugging down the threads) has more to do with the quality and dependability of your installation than the quality of the RG6. To that extent I have been somewhat appalled at the lack of attention to detail in this facet of installation in our own home. Connectors were properly cut-on to the cable but not a single one was more than finger snug and none of these guys have ever heard of using a little silicone grease on the threads; God forbid anyone think far enough ahead to proactively do something to thwart corrosion. Believe it or not there are actual torque specifications (30 inch-pounds) though of course you cannot do that directly onto the back of the receiver else you'll damage it. Still there's no excuse for loose connectors at the LNBF or diplexors, matrix switches, etc. If you can unscrew it with your fingers, then it was loose. A tight connector is a happy connector and a happy connector often begets a happy customer.
All in all, in reviewing this thread from its beginning I think what we see here indicates to me more of a component failure (and quality control) issue than a software one. I myself am on my 3rd VIP722 since last December (5 months ago). My current one was fine for the first month or so, but recently has begun to completely lose the output
signal to the TV, on all outputs (Component, HDMI, 2nd room, etc). No, the IRD itself isn't rebooting spontaneously, the output signal to the display device(s) is dropping out (the TV indicates a loss of input). You can wait 5 minutes or so and it might come back or you can force-reboot it and also wait 5 minutes and it will come back. In the last week we've had to reboot 5 or 6 times.
This brings us full circle back to the original poster's original question. Does E* actually have a receiver that works dependably?