Pragos

Ok, wasn't going to post at first, but I noticed how there were only a few people who said they really used the stasis power. I have an adept shepherd and stasis was absolutely essential to beating this dlc on insanity.  
 
However, I actually only really liked it with a squad member using it. When I play my adept, I actually still like to use my guns quite a bit, so I keep my extra power as warp ammo. But, having liara with that ability as a back up was exactly the support I needed.  
 
For one, it gave me the edge I needed over the bosses. Won't go into more detail, but being able to freeze one was at once very useful and VERY satisfying.  
 
It also helped when someone was flanking around the side while i was dealing with someone directly in front of me (on a side note, I've pretty much decided all of you had evil smiles on when you were planning out the waves of enemies. Hard, but in a good only-a-gamer-can-find-entertainment-in-this kind of way. Very exhilarating) I could freeze the guy to the side take care of the person in front, and finally meet the stunned enemy to the side with a heavy warp when they finally woke up.  
Also a good power to take out key enemy units, which in this dlc were the engineers. Having them frozen at the beginning allowed me to take out 1-2 smaller fry who could still get in the way before finally dealing with the engineer. And as you've already mentioned, it's a great "Oh SH**" move when you got a boss charging you. 
 
The one thing that's kind of negative that I have to say about it is even though your team did take steps to try and avoid being able to lock down opponents indefinitely, someone already mentioned how the stun is still useful and leaves the enemy vulnerable. I may be shooting myself in the foot here for ME3 (and this is all hoping that this power is in ME3) but I say the more you use stasis, even the stun gets negated. That would've definitely taken out the tactic I was using before and would have made me think of something else. But all in all, love everything about this series, and love the work everyone involved did on this dlc, liara, and stasis. Now to go twiddle my thumbs until the next dlc comes out.