thank you for your feedback !
i would say it took so long because on one part you have all the clones (outside the small group of rebels) following the codex religiously making them shun those who don't follow it and mother who is authoritarian with big brother smothering there ideas and keeping them in check. Also the fact that clones who are "loyal" to mother get a early reunion with her and are switched for other clones making for a combo that can keep control for very long. So the docking with Prosperos dream was the best moment for the opposition to act.
i hope that made it a bit more clear :)