When you are a level high enough to have the energy required for massive crops the energy does not regenerate quick enough to farm all the plants. Or if you wanna fish/pet train and farm it's impossible to make any real progress.
What i am proposing Every 10 levels your energy regeneration goes up 10%. It can only be boosted past 100% with gear or a new pet talent. Pet talent. takes agility and will and can go up to 17% of course you can make different variations of this to have a max extra pet (fishing luck, may cast pixie, reveal fish school, energy regeneration and another energy regeneration)