[quote=@Deadlyrose9641]
Yes, pretty much, slightly less armor, and no shield, for enhanced thrusters, and flexibility at the waist
[/quote]

It sounds like you're aiming more for a variant of the RX-78XX Gundam Pixie if you wanna go any lighter. The original RX-78-2 was already pretty agile, especially after the application of the magnetic coating. Although, the Pixie didn't have a Core Block System.