I posted this on bugtracker also, this post serves for the community to share their experiences.
So after gold squish and extensive researching, farming, testing i figured out the following:
After Gold squish:
Herbing in northrend tiger lilly-goldclover-Lichbloom-Icethorn etc. provides close to zero frost lotus. As a matter of fact, Frost lotus drop chance seem less than 2%. Frost lotus price from 1-5g on the AH last year, jumped to 20g+ a piece.
Making flasks with flask specilization won't provide you the x 3-4-5-6 etc ammount provided before gold squish. Didn't test that alot however it seems that the proc chance is alot rarer after gold squish. Same applies to Transmuting titanium
Inscription: Milling herbs.
Milling icethorn provides very little icy pigments and milling other herbs such as tiger lilly and Goldclover provides close to zero.
While icethorn should provide the most, i milled alot of Goldclover and lily's and icy pigment drop chance seemed around 2-3 % Aswell for me!!!! Maybe less
TLDR: In general after gold squish alot proc chances % wise of proffs seem to be lower!.
Share your thoughts and finding guys and girls :) .
So, after a 1000 transmutes, I got 1165 gems. After 1000 brewings I got 1159 potions. I got 56 Lotuses from 1000 Icethorns and 272 Icy Pigmens from 100 millings.
This thread is a "share your thoughts and findings" It is not a full presentation of his data. I think you have a presupposition here.
It's about supposed reduced proc chances for certain professions after inactivity cleanup. Inactivity cleanup has nothing to do with proc chances. Since OP didn't bring any hard info (e.g. 1000 herbs milled/gathered and results of those), I'm convinced OP didn't go through data oriented analysation of the proc chances and based his findings on wrongful perceptions of narrow sample groups.
Thus I treat this topic in similar way as all of those "Warmane reduced scroll drop rates" -threads that rely on minimal sample pools without extensive testing.
Those who did more extensive testing came with reports that don't correlate with OP's findings.