Mining is good - well, aside from Junker's scrap recovery, ALG's toxic waste collection, GMG's gas mining and Liberty on the whole. I really miss platinum mining in Penn as a DSE and dodging Hogosha in NT. Good times.
For the most part, sell and buy prices for commodities are ok. Even legal commodities can earn a trader decent profit.
The core problem is the price of ships and their accessories. Too expensive.
Now, one can "justify" exhorbitant prices for ships and accessories - they're rare, they're prototypes, their hulls are reinforced with an enamel made from ground pixie wings, blah, blah, and blah. But this is a game, in which people should be having fun, not spending inordinant amounts of time grinding.