About DoL/DoH SP.

[Reika]

I have been wondering this for awhile now, and I am suprised it hasnt been brought up but...
Why do DoL and DoH get random SP for each successful craft/gather attempt?

For DoW/DoM it is Your rank vs enemy rank = set SP (Unless you have people hitting the un-engageable.
For DoH it is Your Rank Vs recipe rank = Sp +/- 1 to 80 or so.
For DoL it is Your Ranv Vs Node grade = SP +/- 1-6 or so.

....Why?

Can any any Devs (Or yoshi-p) say why this is, what determines a DoL/DoH SP gain, and if it will be changed someday?

(and please dont say this is another anti-RMT measure ><)