Can someone (politely) explain to me why this is actually a bad thing? Since afaik without knowing any details of "the plot" how is it possible to say that this is good or bad? Surely it depends entirely on a mass of writing which we have not seen and only have vague speculation about? I can see ways in which party locking can work fine, and ways in which it might be jarring, but can't make a judgement until I see how it is implemented. It might be bad and it might be good - so as it stands I only have an opinion that if writers have an idea they should have the strength to commit to it.