I would of personally opted for a DPP44+DPH42 to make sure both of your VIP's and the Hopper got access to all three satellites, but given the (all but confirmed) retirement of 129 your configuration is just as valid.
Yes, I assumed that a DPP44 would be needed if the VIP722's were to be more permanent. But in my case the support of both the Hopper and VIP receivers at the same time was just a temporary situation, so I was trying to add only the minimum HW needed for this temporary bridge solution; even if that meant sacrificing 129 in the meantime.
Not exactly. DPH LNB's are unique in that they only provide two outputs, and when connected to a switch like the DPH42 each feed only provides access to one satellite. This would be fine for EA (72/61.5) but is insufficient for WA (119/110/129), meaning that a DPH42 fed with a DPH LNB will only ever have access to 119/110. Again, given the retirement of 129 this is going to become a non-issue. You are correct in their not being a place to connect the second VIP receiver, meaning a DPP44 would need to be added.
I was assuming that when using a DPH LNB, all three sats, 110/119/129, were combined into one cable feed when using DDP equipment like when it's used with DPH equipment. So a DPH LNB wouldn't quite work like I thought. But since I only had a DDP LNB, I couldn't test this.
Keep in mind that these kind of configurations are only needed for you and me with "exotic" setups, going back to the OP's question it all becomes irrelevant as they most likely don't have/need a switch at all, and as I mentioned earlier a DPH LNB will handle a VIP receiver connected directly just fine.
Yes, these are "unusual" configurations that only a small percentage of us would ever see Let alone use. And yes, a DPH LNB would handle a VIP receiver directly. But what I was putting forth is based on the belief that Dish would only authorize a VIP receiver if it was ADDED to an account (i.e., the Hopper and VIP were working at the same time), and would never (in its current business climate) authorize a SWAP of a Hopper for a VIP at the same time, even if you did own the VIP. The suggestion of "only a Hopper —> a Hopper + a VIP —> only a VIP" was merely a means to get around (barely) installation Dish's rules.
But as you hint at, we've now gotten way off in the weeds from the OPs original question. And these are now just some hypotheticals that will (hopefully) never be tested.
