Fire Daemon said:
Expand on the plot whithout adding new races. A new race will ruin the depth of Mass Effect one, with all the depth in the first one it would seem out of place to introduce a new race.
I must say, this comment confused me a bit. Why would adding new races ruin the overall depth of the game? I would agree that suddenly shoving an overwhelming number of new species at us, enough to overshadow the existing ones entirely, would be a bad move on their part. However, adding no new races at all seems highly unlikely. The original Mass Effect had us exploring less than half of the entire Galaxy, with millions more solar systems being placed outside of Citadel Space and out of the current reach of the council races.
The Rachni are just one example of a species that had been previously unknown before they were accidentally discovered through the use of a newly activated Mass Relay, with devastating consequences. I would be very surprised if the second game in the series did not explore the possibilities of new civilizations being uncovered in this manner.
As for my own suggestions; give the non-story worlds some life! I recall coming across some rudimentary insectile and herbivorous lifeforms on two of the "falling pollen" worlds, and was delighted by that nice little touch. These are unfortunately isolated events, as most of the worlds are barren and dead. Of course, given what we currently know about the state of the universe this really is to be expected. I only wish that, on the planets that *do* quite clearly have the means to support life, that they would give them more than just some pollen and a green texture. Some forested areas, swamps, jungles, with corresponding alien ecosystems would really make up for all those lifeless hunks of rock.
Additionally, I really hope that the Rachni make an appearance for those who chose to let the Queen live in the first game. By that I mean an *important* role, not just some obscure sidequest that has no real influence on the plot. Having your choice in the first game cause huge plot points in the later games would be a fantastic addition. For those without save files, I'm sure there would be a "canon" decided upon by the developers.