I would prefer less air and more information on most of the sides. It can almost never be to less information on the (desktop computer) screen. Especially if it comes to configuring bots the small configuration window makes it more difficult than necessary to spot configuration issues on save. Maybe backtest data and example orders could move to separate tabs?
The following example surely isn’t a design study but maybe it shows how it could look like.
Yes, maybe this could also be achieved with browser extensions like Stylish, Tampermonkey or Violentmonkey. It would be nice to have it without that though.