Industry characters were disadvantaged in LP even before the hunting change, and now things are worse. I play both an industry and a farming character, and find that the farmer constantly gets more LP. I had been trying to balance this with hunting, and even that was not enough - there were too many tasks involving picking plants to start, which then gave lots of LP at later stages - or simply needed doing, causing me to play the farmer more. I've been consciously leaving tasks half done for the industry alt to complete, and even that hasn't balanced my LP completely. If I were only playing one character - well, metal is vital, but you only need a certain amount - a ratio of one miner per 5 or 6 nature characters is probably about right. And while one can mine for LP, it's not especially efficient - I get much more LP per time spent doing many other things... almost all of which require a nature character at some stage of the work.
And yes, I know nature characters were disadvantaged for quite a while, with metal vital and no correspondingly valuable item for them to trade. I just want to point out that the shoe is now on the other foot.