First off, is there any possibility to use 1.5 scaling? I have 27" 4K display and I was used for this scaling in Win10. Next up, if you set scaling to 2, maximizing does not respect enlarged Budgie panel and upper panel of window will become hidden under it.
Sorry, fractional scaling isn't supported by the GNOME stack. They're currently trying to implement this in some hack fests. All we can do is wait to see what comes down the pipeline.
This isn't something we ourselves can fix. I'm closing this as we wontfix, but upstream will.
Anything new on this? Gnome 3.26 introduced an experimental fractional scaling thing that doesn't work on Solus (the option does not appear in the menu after using the command)