I suggested this a while back...

I have a suggestion...

Since your Mutant Power is only doing one thing.. that is making you look adult aged when using any level of size increase... yeah~ technically that IS a power but kinda lame for a full blown power. Why don't you do this.. your mutant power not only makes you look like an adult.. but it also allows you to offset your increased weight from size with carry capacity at your will.

So.. if you were to grow to your full maximum size {31'5"}... you could have a Carry Capacity of 75,460 lbs, with a weight of 34,300 lbs. for a Agility penalty of -16 and a damage of 5d10 OR you could expend 34,000lbs of carry capacity to offset your weight penalties for Agility. Your still weighing 34,300 lbs but you'd have no Agility penalty and your carry capacity would be only 41,160lbs with a damage of 4d10. You could adjust how much weight from carry capacity agility penalties you want based on how heavy you are for a reduced amount of carry capacity and a lesser amount of basic Hand to hand damage. But if you needed to be really strong or fight something your size you could forgo offsetting your weight with carry capacity and inflict more damage and truly be a mighty titan indeed!

I think this would be an elegant way to not cripple the character and yet limit his power on a case by case basis.

Also if you put his remaining stat points into Agility {...which since you rolled random your base agility is 16 so based on your non-size increased weight your agility should be modified to an 18} your agility will be a 24! Even at your max weight of 34,300lbs your would STILL be a 6 {22 Agility unmodified by weight -16}!

And remember a 22 Agility at you maximum weight is a +4 Accuracy to any attack you make. That's pretty awesome if you ask me!