Totally agree with you on this, @Rawalanche — we ran into the same UI scaling pain when testing on a 1440p monitor. It’s especially rough on 24" screens where everything ends up looking like fine print 
While building our own plugin (Asset Optics), we made it a point to follow Unreal’s slate DPI scaling best practices, so our plugin UI scales cleanly at 100%, 125%, and 150% DPI. We wanted it to feel native — especially for teams working across laptops, 4K monitors, or ultra-wide setups.
That said, it would be a huge win if the Fab UE plugin added zoom or dynamic DPI support. A marketplace UI should always be accessible — and right now it can be a barrier, especially for older eyes or small-form setups.
Hope Epic’s team bumps this up the UI backlog — discoverability and usability go hand in hand.