Thank you Chris,
I think the case is pretty clear for me.
Library music is not soundtrack music. Two different genres. So if you really want that your tracks will get syncs in any project, make sure to
1.) Make breaks, so the director, cutter or music supervisor can use it without headaches. It’s very simple actually. Look how music is used in trailers, adverts, etc. only the worst spots use music throughout the entire thing. Usually you always have stops, breaks and climax moments that lead to the next interesting shot. You’ve composed a soundtrack, but not syncable (lisencable) music, that’s what they mean by „commercials standards“.
2.) Climax, another one, another moment that leads to the next „thing“, already mentioned before. It’s really essential, otherwise it’s very hard to get any placements. No one wants to fade out tracks. That’s unprofessional.
3.) You have good ideas, but for me personally I am overwhelmed by them, like „Where is the focus?“ what instrument is leading, where does the music go…again library music vs. soundtrack music. Different things. Simplify ideas and evolve them that is not „overwhelming“ or chaotic for the listener, especially piece no. 1. you can compose, you can write, but you need to know how to write the music that people want to use. If you want to train that, take any spot you like and score it like an advert campaign in the style you like the most. It’s not easy but gives you an idea how to write library music.
4.) What I heard instantly, especially piece no. 1 again, that you don’t like using reverb as you haven’t used any besides the main orchestral library one. You don’t need to „drown“ the entire piece into it, but a sense what an orchestra feels like when playing in a big hall that’s what everyone wants to hear / feel.
5.) library music is between 90-180s music usually. Ads often use 15-30s but are made out of a longer version. If not made custom. 4-5 minutes is very rarely used if looked at statistics. However, if you can develop a track to the length that exploded like a volcano in the end, only then do it. Everything else is again soundtrack, which will not be used.
I hope that helps for now. Look it’s simple. Go to any library even your AJ, and search for most liked licensed tracks. Copy them and you are most likely good to go. Library music is not about being creative or extravagant: „look what I can do“. It’s very forward. Music that has one goal. Help the visual to sell more of what they advertise. The better the music transforms that feeling, the better for your bank. 
To your success,
Alexey
