The maths on it is mostly settled now
There is a particular optimisation system for PCT called “magenta skipping”, since aetherhues 2 (buff) has a 30 second duration if you cast stone in yellow then wait 30 seconds by doing other things (hammer, comets, creature muses etc) that buff will drop off returning you to blizzard in cyan. If you do this you generate gauge faster because magenta doesn’t generate any gauge
If you use hammer to facilitate a magenta skip the you can make hammer a gain in uptime (simulations of a vacuum max DPS rotation involve using hammer to magenta skip, if you exclude magenta skip then hammer is just a straight loss) otherwise hammer is only a gain using a very specific combination of buffs and only 2 and 3 will go into the starry muse window
So for everyone below the pink parsers hammer is now basically a dead button because if you just need to move and don’t care about trying to magenta skip (which itself is a nightmare to facilitate because it can throw off your aetherhue alignment) then holy in white is actually less of a DPS loss than hammer
So now hammer is next to useless, creature muses are only a gain because of mog/madeen. Each part itself is a pretty significant DPS loss and star prism no longer is worth using a hyperphantasia stack on
They’ve buffed filler so far at the expense of painting it’s barely a DPS loss to just never paint at all
That’s exactly the problem, with the potency changes it is now incredibly opaque as to what is and isn’t a gain when it used to be obvious……painting=gain