Second person I've heard today who has been moved from a roof mount to a pole mount with a lot of success.
Can't emphasize enough that anything mounted to a structure other than a pole in cement is bound to shift out of alignment: Houses constantly settle and shift, wooden sheds constantly heat up and warp. The alignment for two-way satellite is extremely critical.
Pole mounts are generally the best, most stable option as long as no one backs into it or some silly thing happens like a tree falls on it. Plus, you can walk outside and wipe the snow off it in the winter.
It may make you look like you're part of the deep state's intel operations, but it's well worth it. <- that may have needed a tin hat/sarcasm/raised eyebrow font.
I just had my DirecTV dish moved from my roof to a pole mount due to having a metal roof put on. I never really had any problems with the roof mount, and the service didn't go out any more often during bad weather than my HughesNet did/does, but I did notice that my signal strength for just about all transponders got better. Many 100s, whereas the highest prior to that was in the lower to mid 90s.
Still, unlike HughesNet, DirecTV now uses an EZ Dig auger and expanding foam rather than the traditional post hole digger and concrete. Or at least the tech did here. It was very fast. It's fairly sturdy, and it's in the ground at least four feet, but it's still nowhere near as sturdy as what a cement mounted pole would be, and which my 14+ year old HughesNet install still is. I couldn't get that HughesNet installed pole to move if my life depended on it. Well... maybe if I ran into it with the lawn tractor at full speed.
Think HN is starting to use the foam now as well. At least they did in the most recent thing I saw. Might be something that's phasing by installers in as existing concrete stock depletes. Seems like something they would buy in bulk. That said, like most technical things I'm starting to get long in the tooth about, I literally know nothing about the foam.
I have a feeling that they may be transitioning to it because it's quicker and easier, overall. From the time my DTV tech started drilling the hole to the time he was able to start mounting the dish to the pole was about 25 - 30 minutes. The foam was impressive, but it was pretty much like the expanding foam you can buy in the can, though in a bag with a hard piece of plastic down the middle, creating two pockets, each of which contained a liquid. He removed the plastic piece to allow the two halves to mix, then poured it into the hole and around the pole. It took about three minutes before it started expanding out of the hole, creating a blob about the size of a basketball, which I broke away about an hour later.
The drilling was the neatest part, though. Perhaps five minutes to go four feet deep. He used this and this. I have no doubt that an HN install would use the same, though maybe a little larger auger if they still use the larger diameter poles in comparison.
Again, I think it's just for speed. I know the DTV guys don't get paid much per job, so this probably helps to make up for it, at least a little. Not sure about HN.
Sorry for taking your thread a bit off topic.