Help What's Wrong with my System

My opinion:

Your speakers cannot pressurize the new room, which is bigger, than the previous one. The answer? You probably need a bigger speakers with better bass response.

It's most likely not your system but the additional size to the room. I would bring the speakers out more in the room. Also because of the extra space you might be having problems with slap echo or other room anomalies. I would try some acoustical damping along the upper corners and possibly on the front and back walls. I am sure you will get things right.
PS the new room is in the same house or another? I ask, because the material used and with the structure has it changed or is it the same?

You need to tell us what is "wrong" with the sound in order for anyone to make an informed comment.