Alchemical Savant requires using your Alchemical Tools as your focus, which this infusion cannot be applied to.Enhanced Arcane Focus: not as good as the other basic magic items, because the spells are already magical and this doesn't boost damage. On the other hand as an Alchemist or Artillerist you probably want one for yourself. If your GM uses an excess of terrain features then it improves in utility.
Even if you think it still has value, swapping to a different focus for those spells that wouldn't benefit from Alchemical Savant, it should probably be called out. As written, it kind of implies that Alchemists and Artillerists get similar value.