At the moment there is one market for food, whether its Q1 or Q5, they all come to around 0.04 Currency per unit of energy recovered. This makes the food industry entire focussed on undercutting prices. That's half the entire game's economy. This makes the module extremely simple and ultimately boring.
How to change this? The first step of many would be to diversify the market and give players a choice of product, this can be done by changing the energy limit from a cap of 600 energy to a cap of let's say 100 food. This would mean that the higher qualities would give players a larger energy limit, albeit at a cost.
This would spread demand across all the seven qualities, eradicating the problem of unprofitable qualities. It would add an incentive to build the higher quality companies, giving players something to aim for and introduce another gold sink. It would also be a step towards making the industry and module as a whole more interesting, turning it back into an asset for the game rather than a hindrance. On the downside, it would mean that the richer players gain an advantage over their peers and while this had been the case before, it's undesirable.
To make this work as well as possible and to mitigate the problem of richer players dwarfing their opponents, energy stats for each quality would need refining as well as possibly altering the RMs required. If higher qualities only fractionally increased energy limits (rather than being multiple times larger, as is) then the gap between rich and poor players would be brought down to reasonable levels.
Thoughts?