We just released a major redesign of the web viewer. The goal has been to remove friction from the user experience and make it ready for more powerful features landing in the coming month.
Hey André. Not the first time we’re hearing this :). We’re thinking about the best way to support setting defaults.
On a related note: We will very soon release a Saved Views feature which makes it possible to save views of your 3D model including any filters, view mode, lighting etc. you’ve applied. A view can also be set as the default view when a model loads so this can become a way for you to hack these defaults. Views are scoped to individual models, though, so it doesn’t fully answer your initial request.