Tilghman adds nothing to the broadcasts. I don't believe that she has any LPGA experience, or certainly doesn't demonstrate any. She also does not seem to have any broadcast or journalism training, given the way she speaks and how shallow most of her comments are.
There are many far better female announcer options, including Pepper and Rankin. Judy Rankin would be a first-rate lead, and Dottie would sure add color commentary. Rankin is as good as any golf announcer on TV today.
I'm at a loss as to how Tilghman got the job in the first place. She must have, or had, some connection to Golf Channel ownership. There certainly are better options for a lead commentator, especially now that TGC seems to be moving toward being the predominant broadcaster of TV golf. I'm sure that the new owners will make the correction.
That said, I must admit that I could/would not watch golf without my Tivo. I record tournaments, or start recording an hour or so before starting to watch. That way I can skip all of the commercials, the banter between announcers, dumb interviews, and the mandatory speech by the CEO of the sponsoring company, telling us how great the weather, course, players, and fans are and how proud that the company is to blow a few million as the sponsor (although in the current economy, this should scale back...).
Try this - count how many golf shots that you see between the commercial breaks. It's usually 1 or two full shots, and 1 or 2 putts, with a lot of walking around and lining up by the players. I've seen cases where they show only 2 shots between commercials. Thank god for Tivo fast forward!
I can watch a 3 hour tournament in under 90 minutes, and see every shot that they show. European tournaments have a much better content to noise ratio, if one can ignore the sad camera work.