I definitely get where you're coming from. And, honestly, I may've been able to get my current book out faster had I not had to navigate through all of that stuff myself and just had someone else do it. However, it left me with a wealth of knowledge that I wouldn't've had otherwise, so I'm happy to've taken the temporary hit to my productivity in favor of being able to rattle out future books entirely at my own pace. It's a kind of freedom that is both exciting and terrifying!
As for copyright laws, some areas are pretty murky, but pretty much everything you mentioned is totally fine and within the law. While I was doing my research into that dark void that is copyright law, I was quite surprised what things you could and couldn't get away with legally. For instance, while you can't quote lyrics willy-nilly, you can use song titles in just about any way you see fit (which is actually really awesome). The only thing you mentioned above that seems like it might potentially pose an issue is "Somewhere over the rainbow". Then again, if you capitalized everything, it probably wouldn't. It's definitely a lot of ass-backward stuff, and I can absolutely see where you (or anyone, for that matter) would prefer to have someone else handle it while you just focus on writing.
Frankly, I've had a lot of people tell me I'm crazy for doing things the way I have been, but the publishing business is, like any old business, antiquated. The way I see it, creative people have more control and influence over their work and how it's perceived now than at just about any point in recent history. The internet has been a great equalizer, in a lot of crucial, and not just for writers, but for artists of all kinds. Yeah, it gives everybody the same opportunity, and a lot of sh!t still gets out there, but people can live off of building even a modest audience if they're loyal, and that's pretty great. I feel like that's the way it should be. Keep the art in the hands of the artists.
And I still cant believe multiple publishers passed on Harry Potter. Everything about that series screamed '$$$$$POTENTIAL$$$$$' from word one. Rowling was smart in her planning. Making the main characters the same age as her target audience and having them grow up with said audience was a true stroke of genius. If I weren't such a naturally vulgar human being (I tone it down quite a bit here), I might well be tempted to veer into the YA market. There is definitely a lot of money to be made there!
Do you mind me asking what kind of stories you're telling? I've seen you allude to your writing a few times over the years and I always mean to ask, but it always slips my mind!