This topic is going really fast. On the discusion of Madina, The explanation some people are giving is just only a small (more public) part of it.
For example the Capital has been changed indeed because of a conflict between almost all Madinas land owners and some others in Madina with Governor Sage who refuses to step down per there will.
This has caused various plots against him, like assasniation atempts, not selling food, referendas, and now the moving of capital and the changing of aliegance of Madinas landowners to the duchy of fatmilak.
Nothing seems to work, against Sage.
And now most of the older members in Madina bound with Sage as a new mutual inner republican treat seems to apear amongst the younger nobles.
The declaration against SA was indeed an atempt to atract refugees in order to deal with the low influx of new nobles.