Been thinking on the concept of "power suites" for mutant characters rather than mutation being completely random. Mutant players could choose a general mutation theme, and roll randomly within it. This would remove the problem of playing a mutant badger who has complete wing development and similar issues.
Some examples:
Brickhouse Mutant
Big, tough and coming to get ya! Brickhouse mutants can be Mutant Animals or powerful beasts (bears, rhinos etc) or Mutant Humans built big and powerful (The Thing, Steel, Colossus).
Roll D8 Physical
1 Gigantism
2 Increased Physical Attribute (STR)
3 Increased Physical Attribute (CON)
4 Natural Armor
5 Increased Caloric Needs
6 Obese
7 Pain Insensitivity
8 Slow Mutant
Roll D8 Mental
1 Ability Boost
2 Accumulated Resistance
3 Damage Turning
4 Force Screen
5 Atrophied Cerebellum
6 Negative Empathy
7 Phobia
8 Weak Will
Egghead Mutant
The brainy types that are usually at least a little gross. Many become super-scientists or at least really good with gadgets. Skilled Mutant Animals (monkeys, raccoons, etc) and Mutant Humans with giant heads and a penchant for labcoats and monologuing.
Roll D8 Physical
1 Dual Headed
2 Dwarfism
3 Reflective Epidermis
4 Increased Sense (touch)
5 Albinism
6 Bizarre Appearance (Giant Head)
7 Epidermal Susceptibility
8 Sensory Deficiency
Roll D8 Mental
1 Dual Cerebellum
2 Increased Willpower
3 Intellectual Affinity (tinkerer)
4 Quick Mind
5 Dual Cerebellum (Defective)
6 Negative Empathy
7 Phantasmal Damage
8 Phobia
Feral Mutant
From predatory Mutant Animals (dogs, cats, wolverines etc) to Mutant Humans with animalistic themes (Wolverine, Sabertooth, Tigra etc).
Roll D8 Physical
1 Aberrant Form (Claws or Fangs)
2 Increased Sense (Any)
3 Quickness
4 Regenerative Capability
5 Bizarre Appearance
6 Pituitary Deformation (Animal Years)
7 Prey Scent/Predator Scent (pick one)
8 Simian Deformity
Roll D8 Mental
1 Body Adjustment
2 Combat Empathy
3 Intellectual Affinity (combat)
4 Know Direction
5 Atrophied Cerebellum
6 Negative Empathy
7 Phobia
8 Weak Will