One thing I haven't seen mentioned here is incentive. During ST4 it was common to get field clear bonuses of 15k+ XP to clear a hulk/asteriod/gas field. Now in live the most I've got to clear the field is 1600 XP. I'm not saying to go back to pre live days, but if I spend 20-30 minutes clearing a field I should get a better reward.
As far as cherry picking, it's a pain in the but. As you increase in lvl and areas explored you will find more fields. I mine about 6 regularly, 2 or 3 may be picked but the perseverence pays off in the end.