Using the vanilla inventory 2x2 Grid is unbearable.
When using the custom crafting interface, shift dragging items results in ghost items and a lot of times clicking items into the GUI makes them go back into your inventory. I just simply wish to craft items but I have found that I have to pick up sticks for example and right click, wait 2 seconds, then right click them again to make sure they stay in the GUI.
I know that this server is still a WIP, but I appreciate the effort being done by the devs/admin team, maybe once I stay for a while I'll apply myself.