You can't put a station building, access road and car park in the existing railway boundary anyway. Remember all the land to the north of the line is part of the overall development, for which this funding has been released. To put in a station regardless of whether it needs loops, requires additional land. I'm just suggesting a more cost effective and less disruptive construction approach.
Yes I can see that but you are going to be increasing the curvature of the line which is exactly what you do not want to do. It is currently a 100mph stretch of running line. Any decreases in line speed along with slower speed crossovers isn't going to help in improving capacity. We have repeatedly heard from politicians that they want long, high speed loops so services can leapfrog each other without effecting each others journey times. Low speed short loops just enable services to be started from the new station during the morning peak rather that Chelmsford itself. This whole project seems to have already been quite radically scaled back from the original master plan.