The article shows usual political drama. Seems like Chega supports GV and leftist parties oppose that. When it comes to nationality law (for everyone, not just GV folks), no one can say anything directly against 10 yr rule as it’ll hurt the party. Employers are against this change at a high level.
I think in the end, the factors influencing the decisions will be: if they want to grandfather existing applications in an inconspicuous way without enough media coverage to keep voters happy while maintaining country’s reputation, and how much corporates have influence on govt in Portugal .