Thanks a lot for your feedback! Happy to hear that you’ve enjoyed using the new tools.
At the moment, everything is obviously super WIP, and the UI is a placeholder and will be replaced by something far less clunky by the time it gets its first official release. Something like the Bridge tool is on our priority list, as well as a few other ‘must have’ features found in other content creation packages. Over time, we intend to continue to add new, useful tools. We’ll also find a way to distinguish whole mesh operations (like Quadrangulate) from others which work on selected elements.
Regarding key bindings, the aim is to ensure that everything (including modifier key actions) are user bindable, which (a) aids discoverability, and (b) allows users maximum freedom in configuring the editor to their preferences. We’ll be working on a way to do this without needing to hardcode anything, while also supporting VR editing and its (different) action bindings.
Don’t worry, the grid isn’t here to stay - again, it was a placeholder material - and we realise it can be quite visually intrusive. We’ll probably add an Editor Preference to disable it for the time being.