Bold doesn't have a star of the show ever since Susan Flannery left. Sorry, but that's the reality. If you look around the boards, you will find that most characters right now are more or less NOT liked and annoying viewers as hell - including your favorite - Steffy.
I also don't understand how anything of what you wrote proves your thesis that older characters shouldn't be leading story. Nobody is saying that 30 to 40 year olds shouldn't be leading, but this is not what you said, was it? You said that older character shouldn't be leading storylines. When they should - not always, nobody says that, but THEY should when the time and storyline is right. It's incredibly ageist in my opinion to say otherwise.
And I'm sorry, but no matter how you spin the ratings after Hope/Liam/Steffy began, I know for a fact that countries around the world stopped airing Bold after one or two years of this unbearably boring triangle. I wonder why that was? And nobody is saying this is because the characters were young - my opinion is that people hated this generic copy/paste of the original triangle that nobody wanted to see for the 198289th time. Bradley didn't write it in any different way - he just made Hope into Caroline/Taylor, Steffy into Brooke and Liam - the most basic male character there is. And I haven't seen this GREAT ratings bump you are talking about. What I'm seeing is that after 1-2 years of an increase, the ratings have continuously declined. How do you explain that?
Anyways, I wanted to talk more about the issue of older character leading, but seeing how every time the facts are repeated, there is a derailment and shifting the focus, I don't know what else to say. Except that older characters are very very important to soap operas, and history of the genre has proven that hundreds of times. People over 50 or 60 are most interesting to me and to a lot of other viewers and we crave storylines where there is maturity and level of experience in the characters. That's all. I respectfully disagree with the ageist statement that older characters shouldn't lead in soap operas.