I was thinking about solutions and here what i find so far :
* i can't change a component unless i replace the entire wall or door.
* to show phasing , i found three solutions
1 - graphic override : create a propretie with phase numbers : 1, 2, 3, 4, ... n phase, then override each phase according to it's propretie value, this can be done the show all phases with different colors,
2 - layer combination : each phase has it's own layer, or a bunch of layers to keep all organized ( walls, slabs, columns of phase 1, the same for phase 2 etc)
visibility can be controlled via layer combinations
3 - linked modules : each phase have to be modeled in a seperate file, then, the are linked to a common file, and the rest is just layer combination work.