USIA Runners have mentioned this a few times. My personal thoughts are: in the short term, perhaps CCP could increase standing gains from mining storyline missions to account for decreased accessibility and make these missions more rewarding to complete in terms of time/effort(/ISK if importing)? @Mike_Azariah 0.01 ISK for your thoughts
This is no problem if you can fly freighters. Just haul enough ore from jita/amarr to your mission system. (8k kernite in jita is around 9M at the moment, still leaving quite a bit of room for profits for +4 implants)
If you cant fly freighters, its bit of a tough luck for you because it usually becomes too time consuming with normal haulers to bother anymore.
Already in discussion with CCP about this, as of last week. But always tag me for this sort of thing, please. Just because I had this one already in hand does not mean I will not miss the next.