hi mate, i have gotten the twitch and after trying many contollers loving this one small and has al I need.
to get back to your story yes its output is bad is very low.
so my fix is I am using s mini mixer (DAP SC-5) it isn’t the best. balance the output for distortion free sound.I use this when I play in clubs.
my other option is the Y CABLE using the main and bootout made it myself.have ordered the cables and buy cutting them I soldered left main and left boot together and right main/boot together.
be aware you wil get fase problems if u dont crank the volume all the way on both channels. and I use shift/filter to balance my channels output.
this works very well and cheap way of gaining nore output from novation twitch