There are options that can be added if such detail is desired.
The options I am about to list wrap around the idea that all change spells create a bland form that is noticable to the trained eye as "basic shapeshift magic."
The optional skill spell artistry is a good choice for detailing shapeshift magic. A very hard (-20) check will allow the caster to create an original form, but not a copy, that will pass as any race with average appearance. Good or bad looks adds an additional penalty modifier equal to the mod attempted. So in RMFRP, to attain a -10 AP mod (or a devestatinglt attractive orc in the eyes of orcs) would require a -50 Spell artistry check (-20 plus 3x stat mod desired). In RM2, the stat mod would be a straight add.
Likewise, if the GM wishes, altering armor, clothing an items could require skill checks. Changing color only would be a light (+10) mnv, moderate changes to size of objects and physical appearance would be hard (-10, such as a sword to a dagger, a change in outfit, plate to chain or chain to leather or leather to a cloak/jacket, etc), major changes would be very hard, while absorbing the objects into the new form would be extremely hard.
If a GM wishes to limit skills, then use spell mastery instead.
I have to run, or I would add a great deal more. Perhaps later.
lynn