To add to my previous post:
All my +def powers are showing some variation of 0.0#% in the info box, where # varies from power to power. After some poking, this looks like it's moving the decimal to an incorrect location in the display, the correct total is being displayed and used elsewhere.
After further vigorous poking I'm reasonably certain that some of the wonkiness with Stealth in particular is because it grants two separate defense bonii, with one of them marked to suppress in combat. It adds both of these bonii to the "Totals for self" box, which means reaching defense caps with Stealth in the mix requires some out-of-program napkin math. Alternately, I may edit the database to remove the suppressible defense.
Combat Teleport does not inherit any +toHit from incarnate alphas. It doesn't take +toHit enhancements, either, so that may be working as intended. When I get a chance I'll see how the power acts in game.
I've also noticed that power slots no longer remember that you've +5'd them when you change enhancements,