I previously stepped into threads to defend going up levels and increasing energy tank as a net benefit based on the fact that it was linked to quoin value. Now that it is de-linked to that, you can estimate whether max energy is good for you by whether 3.2 x hours played per game day + teleports < 10. For those of us who often play more than 2 hours at a stretch it usually won't be. If you play 3 hours in one game day then it pretty much surely isn't.
So basically buying energy tank is a bad thing. If there was a card to decrease my energy tank, I would buy that (I want about 1k just so I can season full stacks of beans and such conveniently). Is there something we are unaware that makes maximum energy a benefit to everyone, or is it only a benefit to those who play in short play sessions?