It would, but does it not also make each new fight seem that much less like an actual experience that players face together? I understand that XIV fights are already damn near solo instances played in tandem, but it just seems like that's not necessarily an impression that would serve the game best in the long run to enable, to the point that I can't help but look cautiously even on obvious QoL for it.
Like, it makes sense. It can do good. I'm just hesitant to add a further paving stone down that path of streamlining out of concern for where that path may likely lead, if that makes sense?
Of course, there's also the problem of even situating this practice version, since often what ought to be done is strat-dependent. If you create a solo-instance practice version that either (A) it will have to pick a particular party strat to demonstrate --thereby pushing that strat onto the community and reducing the available fun of strat-building/-adjusting-- or (B) it can only really a mechanics-viewer (solely what the boss does, as you might see already in an Adventure Guide or the like with an embedded video player), rather than a party-actions viewer (i.e., what you[all] should about it).If I'm in an orchestra, I can practice my part by myself. I don't just read the sheet music at home and try to imagine how it would sound.
Of those, I'd actually prefer the latter, as it's at least less invasive and acts as a better SSS alternative without necessarily seeming to so badly devalue the later party experience (little if any worse than being pushed to watch video guides in advance).