Class Design window, in the list of the installed systems in a class, next the name of each chosen item, would it be possible to indicate its weight/size (in the case, multiplied by the number of the installed ones), or indicate the mass/size of the type of systems (let's say, all the engines, all the lasers, etc.)?
IMO, it would help in balancing the weights, or in finding the item(s) to improve with new research project(s).