To say I was disappointed by the Physical Boost Focus Power is an understatement. Thinking about it, I came up with following option as replacement. I would welcome any comments on suitable/powerful it is. I tried to base it so that power-level wise it is rough equivalent to Druid's Wild Morph. I've also included a few examples of using it below. Note: the text is longer because I tried to cover all possible questions/misuses. XD
Form Weapon
[Focus 1]
[Uncommon][Wizard][Morph][Transmutation]
Cast: 1 to 3 actions, somatic
Duration: 1 minute
You form a weapon out of whatever matter is available nearby.
You form a one-handed melee weapon that does d4 damage and has a bulk of L. Pick any weapon group and any damage type for the weapon. If you form the weapon out of specific material, weapon stays that material. Treat the weapon as if it is on your class list for purposes of proficiency, expertise, and specialisation.
Alternatively, you can choose to reshape an existing weapon, in which case you maintain the same weapon group and damage type, as well as the same bulk, quality, and runes. Note that weapon loses any traits and damage die resets to d4.
When you finish casting the spell, select the following improvements to the weapon, up to a maximum of 1 morph point per action spent casting:
If you create the weapon from another weapon or object of similar bulk, the whole object transforms. Otherwise the original object is counted as not affected. After the spell ends, or at the end of the action the weapon leaves your hand, it immediately disperses and reforms back into the original matter.
While formed, weapon is treated as having the hardness and HP of the object it was formed from. If it is broken, it reforms into the basic form.
Heightened (4th) 2 morph points per action to cast.
Heightened (8th) 3 morph points per action to cast.
Example 1: 1st level wizard spends 3 actions casting the spell on their Dagger. They decide to spend 1 morph point to increase the damage to d6, and to add the Fatal trait for 2 more points, which results in the following weapon:
Damage d6, Piercing, group Knife, Bulk L, Traits: Fatal d8.
Note that the weapon doesn't inherit any of the traits of the original weapon.
Example 2: 7th level Wizard casts Form Weapon on the +1 Silver Scale Armour they found recently. Wizard spends 2 actions, forming a Flail type weapon doing Bludgeoning damage, and gaining 4 morph points due to spell being heightened to 4th level. They decide to spend 1 point on increasing damage to d6, and adding Disarm, Sweep, and Two-handed. Final weapon has the following profile:
Damage d6, Bludgeoning, Flail group, Bulk L, Traits: Disarm, Sweep, Two Handed d10, and it is considered Silver (but does not become magical).
Example 3: 9th level Wizard casts Form Weapon on their +2 Striking Dagger, using only a single action to gain 2 Morph points. They choose to spend both Morph points to increase the damage to d8. Since they cast it on the weapon, weapon group and damage type does not change, resulting in the following weapon:
Damage d8, Piercing, group Knife, Bulk 1, Traits: None. It is still treated as +2 Striking weapon, thus providing +2 item bonus to hit and rolling total of 2d8 for damage.
And yes, part of the idea for this spell comes from Full Metal Alchemist. :D