If I was in control of broadcasting, etc., I’d severely reduce the bitrate of the MPEG-2 simulcast channels, and put most of it into 3 x MPEG-4 HD channels.
I’d have:
07: 7 SD -------------> 3.0 mbps (MPEG-2)
70: 7 HD ------------> 4.0 mbps (MPEG-4)
72: 7Two HD -----> 3.5 mbps (MPEG-4)
73: 7mate HD ----> 3.8 mbps (MPEG-4)
74: 7Two -----------> 2.1 mbps (MPEG-2)
75: 7mate ----------> 2.1 mbps (MPEG-2)
76: 7flix -------------> 2.4 mbps (MPEG-2)
78: Racing.com → 1.1 mbps (MPEG-4)
Obviously, the MPEG-2 channels wouldn’t look fantastic, but that would hopefully encourage more people to utilise the HD channels.