Not sure why you would say that as all they are doing is going from Mpeg-2 video to H.264 video.
All else is the same.
Unless you have an old receiver that only does Mpeg 2 video then you have a problem but most receivers do H.264 now so there should be no problem.
Your Micro hd receiver should get them fine, but you may need to delete the channels first then re-scan them back in.
Not a problem. not really an electronic geek either but happened to use an old receiver that showed the video codes and compared them to an old listing.
I may not be an electronic geek but I do try to keep a written down track of the signals we like to watch here with their pids and video/audio type so if there is a change it can be made on all the receivers.
LeSea has a variety of programming on their channels and I would not want to lose them either.