I'm mostly focusing on increasing torsional rigidity around the gears and limiting expansion on the ring & pinion side of the front diff housing. 1/4" steel plate is not the easiest stuff in the world to twist.
Again, hardware will be upgraded as well. Class 10.9 metric bolts will allow for roughly a 30% increase in yield strength over the stock bolts. So not only will the case be reinforced against torsional flex and expansion in the front diff cavity, but the case halves will be clamped together tighter.
Hybrid, Not sure what you mean by "mounts." I was planning on releasing some aluminum shift bushings down the road... But no plans on a transmission mount yet. If you're referring to anything in the picture of the test fixture, that's simply a frame to keep all output shafts from spinning while I apply torque to the input shaft.