Thanks a lot for your feedback! 
is it possible to allow certain groups to post more posters ?
Yes, you can - for example - create a new group file and change the value of "customimages -> maxupload" to the desired amount. The "admin.permissions" file for example increases the default upload limited (set to 10 in the "default.permissions") to 100.
Well... goodbye World-Edit
Well, as long as no tools like area filling etc. are available, and no way to place/remove plants and objects, the WorldEdit script is still quite useful 
All worlds are now named new world
That's true, it will be changed with the next bugfix (probably today) 
[Issue] + does not work on keyboards that have no numerical keypads.
You can rebind the key in your settings, under Controls -> Placement (it's named "Grid (scale up)" and "Grid (scale down)" at the moment, the same keys that are used to increase grid size when placing objects. Eventually there will be own keys in the settings for that in the near future)
when seeing "NPCS Placements" bit thinking to the NPC Traders
Touché 
instead of one single frame where you select the pattern with the scroll wheel, how about a grid of patterns grouped in labeled categories with each pattern labeled
Yeah that's on our list
The same is planned for object variations in the regular crafting menu (to have an overview of all available materials, without having to click the small arrows all the time^^). Eventually we get it ready for the next creative update (but only after the biomes)
When I go into my dedicated server as admin, I can't activate mod game "setgametype 1" not active.
By default, this command is not allowed on multiplayer servers. Being an admin in the server.properties grants you access to all regular commands, but if you want specific permissions (use blueprints, enable creativemode, flymode etc), you have to use the new permissions system. You find two example permissions in the "permissions" subfolder: The "default.permissions" is basically the file which servers as basic permission and affects all players and all other group permissions. In the groups subfolder, you can place custom group permissions (which inherit the default.permissions, but can override particular permissions). You find an example "admin.permissions" group in there (it can be modified with a texteditor, by default, creative mode is allowed in it).
Ingame you can use the command setplayergroup PLAYERNAME GROUP now to assign a player to a group. For example, to be a member of the admin group, you can type setplayergroup playername admin 