As a long-time investigator player, I can accept the benefits of DaS so far, but the most serious problem with investigators is that there is no "plan B" (Except alchemical science methodology). DaS is not a problem at all if the investigator has a special high-yield "plan B" according to his methodology and becomes a primarily ancillary class with a primary logic of action.
So the feat list(no action, no reaction list and I think investigator's feat list is the worst list in PF2) and methodology need to be rewritten to do this.
DaS is a very good single action with a good fit（Eldritch Archer and undead slayer）, it provides stability that other classes can't provide.
