Is that really all it costs? 300k is NOTHING at 50. I spend 300k+ a day on underworld missions, repair bills, and stims and I make it all back and then some through selling underworld metal and doing my Ilum/Belsavis dailies. I am actually making more money every day than I spend(currently at 1.6 mill and make about 100-200k a day).
I would rather see them buff up the other crafting professions to biochem's level rather than nerf biochem but atm most of the others are almost worthless at 50. I'm an Armormech atm and I can say without a doubt that the only 2 pieces worth making at 50 are wrists and belts. Helms, chests, gloves, legs, and boots are all worse crafted than if you simply buy an orange from a vendor and do your dailies to mod them out. You can completely mod out a single piece of armor in level 50-51 epic mods per day just by doing your dailies. The same goes for weapons. So basically the only thing worth crafting from Armormech is wrists and belts as there are no orange moddable versions.
After I make myself my Rakata belt and Rakata wrists with the biometric crystals from hardmodes/raids I am without a doubt dropping this worthless profession and going biochem(especially now that I know it's only 300k). You get a reusable 60m buff that is better than what you can buy from a vendor and a reusable stim pack on the same 90s cooldown as normal stims so you'll never have to buy a stim again. That is much better than crafting epic chestplates hoping some idiot is dumb enough to buy them and doesn't know about his dailies.