By definition if something takes more time its more time consuming and that is all lol
time consuming does not mean hard at all.
The rep grind for exalted timermaw reputation for the rep rewards was not hard ... its was mindlessly easy but stupidly boring and took absolutely ages ie took a lot of time, the winterspring sabre mount the same.
Your naming the few exceptions not the general rule. And even those things that were hard involved daft amounts of grinding to do the prep for them.