The one issue I have with the new lambda syntax is that it locks down the -> operator, which I expect to be very useful for DSLs.
With respect to list comprehensions, they appear to be a bit too overspecialized for my taste; it seems to me that the sensible approach would be to express list comprehensions through iterators.
I kind of like ->, but the big one to me is =>. I use lambdas a lot, and that would be very nice.
I couldn't care less about comprehensions. Map and filter are all I need! :)