[stargazer-3]

One thing missing from @petschge's reply: adding more telescopes! This will not improve the imaging the smallest possible features, but will make features larger (disk and / or jet components) more prominent. The more telescope pairs with different distance between them are added, the more complete the picture will get - up to a limit of having a single antenna roughly the size of Earth.

Furthermore, adding more telescopes will help better image the fainter features in the image (due to larger total collecting surface).

[petschge]

Very good point. I was too much focused on resolution. Adding more telescopes would indeed give a better picture of large structures (most are cropped out of the current view because they are not well imaged and you would mostly see artifacts from the image reconstruction) and improve dynamic range, i.e. allow to see things much fainter than the brightest spot in the image.