It wasn't that long ago that the TT got Zero TV coverage.
Yes compared to some other sports you could say it's Pi55 poor but I think you'll find that for motorcyle road racing no other event gets anywhere near the time, quality or depth of coverage.
It was worth watching every night IMHO.
I think ITV4 are also going to cover the Classic TT this year. Not doubt that coverage won't be worth watching either then