I recentlly added blue arrows on DL and DR too.. yah, just to make them play more defensive and it works fine for now.
I used only Blue arrows on DC DC and DMC in the begining, now DL and DR got them too.. can't say on 100% that it works cause the changes are minimal and may be for some other reason.
My team:http://www.topeleven.com/manager/p/B...AwNTYwNzM1MTQw
Road to the Treble & How to win the Cup: http://forum.topeleven.com/tutorials...xt-season.html
Top 10 Formations & Tactics Guide:http://forum.topeleven.com/tutorials...ics-guide.html
Those guides are based on my personal experience and other managers suggestion/feedback