Hey, in short:
1. "Designing modular and reusable systems" - use existing ones, or ask AI for help if it's an easy task.
2. "Assets, tools, or workflows that can improve development efficiency" - again, use ready-made ones, lol, and don't be afraid to borrow other people's code.
3. "How we can make UI controls and transitions more practical" - It depends on your needs. I develop in Godot, and it has a wonderful tweens system. They let you quickly set object properties, like the alpha channel of text to fade it in. The beauty is that it requires minimal manual control - you only need to write two lines of code and you're done. You can even wait for the tweens to complete using await or even loop them. I don't know if Unity has something similar, but it's really useful.
4. idk
5. "How to better manage scope and actually finish projects" - while creating my game during this jam, I also overdid the scope, and I realized that the main thing is to get things done. And once you've done it, that's secondary. Don't be afraid to add features, assets, graphics, sounds, and all that. It might be a bit clunky, but it'll work. I realized it's better to get it done somehow than to put it off until later, thinking, "Oh, I need to make a super system here with advanced, well-documented code."