Here are some useful and needed Ideas from other languages/frameworks like Rails, Django, Go, Node or new ones.
- JSON views for versioning in blade. Like ruby's erb or something more user friendly.
- A port of Django's humanize api
- A port of Ruby's HAML template engine
- Email inline css handler
- Exception notification
- Rails nested forms
- Rails split test plugins jssengers has already done one.
- Automatic admin forms like Django
- Persianizing blade and twig
- Cacheable sections for blade
- Laravel5 plugin for oh-my-zsh
- Translate LaravelTheRightWay