Fix showimg so that you can use something like "playerx+0.5" without the image jumping around when the player is moving (if possible) also it would be nice if showimg's that have a decimal value would show up serverside for the other players.
Layering, well this would be extremely wonderful. If this and transparecy were added to Graal, I wouldn't even think twice about upgrading. Basically just having either predefined tiles, or tiles you can define, as a layer above the player. I don't care about any other layers, I just want one that goes over the player and of course, isn't blocking.
Transparency. So we can finally make shadows and better transparency effects instead of using alpha blending.
Serverside tile changing (that is permanently saved to the level) so if you dig a hole, it stays on the level (if scripted that way) the hole will actually be updated on the server into the level itself and saved so that everyone sees it.
Either do the above, or at least add more tiles that can be seen serverside when changed? For example, I only know of the dirt hole and the cut bush tiles that can be seen by everyone. It would be nice if there were more tiles if the serverside tiling couldn't be done.