Hey @luisalvarado just to give you a more fully-featured response as I appreciate you taking the time to review the roadmap and I was OOO yesterday. 
As mentioned, we’re looking to hire more folks into the Ubuntu Desktop engineering team at Canonical, with passion and skills in a range of areas to help us deliver against the questions raised at the end of the post. But joining the team isn’t the only way to get involved, from writing documentation or tutorials to posting feedback or reporting bugs on our ongoing work, even starting well-structured discussion threads around the areas we’ve highlighted above - all of these we read and review for consideration when constructing our roadmaps. That doesn’t mean we’ll have the capacity to actively work on all of them, and everything must be filtered through the lens of Ubuntu’s mission and values to make sure we’re delivering a well-rounded ‘whole’ to all of our users.
To talk to gaming specifically:
We have a small but dedicated team focussed on gaming and whilst initially our priority was on delivering the Steam snap with its supporting user-space driver content snap, now we want to broaden our remit. Ideally our focus will be on sensible defaults and easier configuration for gaming at the OS level alongside upstream contributions. Things like Boosting the vm.max_map_count in Ubuntu is a good example of simple tweaks that can have significant impact. If you have (or wish to help collate) a list of targetted changes for gaming, please do share them and we’ll review for consideration in our roadmap. We’ve also started an experimental Matrix room to test the waters for more direct collaboration and dev discussion https://matrix.to/#/#ubuntu-gaming:matrix.org