Are you really atte. To go to compare a scenario where Alice actively takes some action to "create* a focus item that may require some effort to physically hide it as equivalent to Bob simply saying " no I ignore that & don't need a focus or improvised weapon... in fact I ignore the problem with being cuffed that are going to hinder Dave's claws too unless you fiat an adversarial 'because the gm said so' type roadblock for this one mold breaking ability of mine as well"?
@MarkB that battlemaster ability does not deal things like 5d6+banish or 3d6+blind.
and it's still problematic design that has the GM needing to appear fair while juggling the fact that Alice & Bob are playing by a very different set of rules for basic attack declarations because one can retcon a resource consuming action into their quantum attack
after determining success while the other & the rest of the table only sees the GM enforcing an unfair situation