If my work was easier with a better relation with the pilots I would try to improve it. But I donīt think so, so Flight plan route assured for a long long long time. As I always say, Eurocontrol suggest it with the Flight plan adherence initiative.
And we have reduced the 47 A class incidents of 2010 with that policy, I think itīs safer also.
Read the first coplain... "fly the full SID or STAR". Then, what are SIDs and STARs for? Sometimes I donīt understand pilots...