Long long time ago in far away galaxy someone allowed quanum helmet to provide creative mode for anyone who wear it.
After this any type of farming food (ever with crops) gone useless, also canning machine gone obsolete (mostly) (in SMP completely).
As some of reading this post know about foodsystem change (food now stackable) ability to convert any type of food into melon slices with canning machine at cost of energy and tin cans not a gameplay option anymore.
Stack of meat will provide 8 times more food then stack of tin cans, instant healing of 2 hps cant offset this.
Suggestion is to use potion effects and change foodcans calculation:
canning machine consume food items, as soon as internal buffer greater or equal to 10 food units, food can is created.
every foodcan restore 10 food and 20 saturation instantly, provide regeneration similar to golden apple and restore additional 10 food units over 60 seconds.
Such changed will make canned food superior to anything else, since it allow to stack food futher.
Quanum helmet shoud not restore food, and quanum-nano suit shoud not protect from hunger damage, this will disable creative mode on quantum and make it much more balanced on SSP.