The trigger will slick up on it's own, however taking creep out of a 1911 trigger is not something that should be attempted unless you have the proper fixturing and know exactly what you are doing.
Additionally the MIM parts (primarily the sear and hammer) are certainly not designed for a perfect trigger pull. A good smith can certainly work with them, however I would not invest the money into a trigger job unless I was replacing the hammer and sear with something that is much more durable, such as the parts from EGW, Wilson Combat, or Les Baer.
All in all, I would say that the triggers I have felt on the SR1911s I have handled have not been bad at all. I would say give it 2000 rounds or so. If you still don't like it by that point you can look into a trigger job.