Just watching the video now. I like the new holographic spike weapon wotsit. I'm sure it'll come in handy when you get swarmed by husks.
Looking at how they're using Mordin has me thinking that they must have had to do a lot of redundant voice work in this game for characters that may not have survived ME2. Presumably they'll do what they did for Wrex and substitute the dead character (possibly Mordin in this case) with a very similar character to fill basically the same role.