You never know. He could hold up a collapsed walkway, become a pendulum, counterweight for a trebuchet. There are plenty of reasons. Also, will Scaleraker's durability translate to leg mode? Give God Neptune a indestructible boot basically.
Yes sure why not. But are you OK with the change? I don't want to force you.
Now that i know it's not a complete change, just a new alt-mode, I'm cool with it.