Hey @camillo69
Thanks so much for joining out community I hope you have a good stay!
So to begin, it sounds like you are missing a command in the Start G-Code, I would check to be sure you have the line M109 after M104, this will cause the printer to wait until the hotend temp is reached to begin the print.
For the moment the Queue is no longer in MAttercontrol 2.0, we still have a directory for it but I have been advised it is non functional.
As to your advice on the features of Mattercontrol, could you please clarify the request. Are you asking to print a material every other layer or make different layer thicknesses for infill and support?
Thanks!