The childhood, overly excited smark version of me would almost certainly agree with your comment on Steph. But captain hindsight & time can help clear many things.
For one, lets assume that hypothetically, Steph was a terrible booker, she was made the head of creative around 2002/2003; and I ask myself this question, what was it about Smackdown during her leadership that I really hated? Honestly, not a lot, Steph was put in a difficult spot to prove her worth to her Father by having to manage wrestlers who watched her grow up in the business quiet literally, she was a child to them; just imagine how difficult that must have been, it’s like being an employee in a top company and your nephew ends up in a managerial role. To make the environment even more intense, Heyman was bought in, a guy who was still very much on edge from the fallout of ECW going down under, he came in with a big chip on his shoulder & a huge but justified ego because he was a genuine visionary unlike the whore he is tasked to manage at the moment. I don’t know if Steph’s position was going to be permanent, because her Father had her do a variety of roles as he was shaping her to run the business so it was a part of her learning curve, and in the environment she had to work in, Stephanie did a good job actually. I could have bet £100k if I had the money that Heyman was going to clash with whoever was the head of creative in 2002, he clashed with Gerwitz and even Vince, like I said, childhood me would have said something like ‘Haha Steph clashed with Heyman, such a hoe! Jericho was right!’ Heyman was wrestling royalty for smarks & the godfather of the independent circuit which would be shaped in his name, ECW literally was split into ROH & CZW, so reading a bit of dirt about the two was always going to get blown way out of proportion!
In-fact, if memory serves me well, Heyman got along much better with Stephanie then he did with Vince, Steph had great instincts & became to appreciate Heyman & accepted what he wanted for Smackdown was best, I think there was more heat between the two when it came to some of the segments which Heyman wanted Stephanie to do as GM, but thank God we got to see those if it’s the ones I think, because they are forever etched in my memory

Stephanie repeatedly refused Heyman’s resignation as well, she knew how good he was, Heyman wasn’t ‘fired’ in the way we assume & it certainly wasn’t Stephanie’s decision in the end. There is an old interview out there where Heyman is praising her and I don’t even think he was on the WWE pay-roll at the time of the interview, if I find it I will share it here.
Having said that, I would agree with you she is more suited to exec type roles, however, I just wanted to highlight this to support the view that she would do a much better job then H and isn’t anywhere near as big a narcissist as he is.
In the end Vince was shaping Steph for the business and saw a lot of her in himself and he was right because she was also responsible for putting him out, kind of like Vince being a rebel against his own Father once he got the keys to the kingdom.
The biggest criticism I have of Steph is marrying that 4/10 garbage can, during one of her ‘internships’ as head writer in the 2000, you can guess who was the biggest beneficiary of that stint………