I don't know about gil reward and income rate for leve quests after 2.1. However, commenting on you saying EXP nerf - I believe that's not the case? May be I am wrong and didn't read the patch note but I have just leveled my weaving from lv35 to lv50 in 2 days, using around 40ish leve allowance.

I completely relied on HQ items from the market and trade in using only HQ items. That got me to lv50 extremely quick. I calcualated to have spent 100k gil to reach from lv35 to 50, roughly 3.5 HQ items per level, on leve quests.

Today, I have spent 30k gil to get my culinarian from lv18 to 37. Around 30ish leve quests.