The pigmentation issues could be nothing... hopefully new growth doesn't continue to show it.
is it some sort of genetic mutation or some esoteric ratio/concentration of nutes in teh soil wreaking havoc on leaf development? Hard to say. Time will definitely tell, lol.
if it is rapidly growing i'd lean more toward funky genetics than environemental causes. Not all leaf mutations are a problem. A couple strains out there sell for a premium price just becuase of their weird looking leaves. This is a type of plant i trash to avoid the risk. If you are expereinced andknow how to treat a plant, even more reason to trash it.. because it's mor likely genetics at that point. I'd give it a bit more time to see if it grows out of early troubles. Perfectly normal plants can look fugly the first 3-4 nodes and then turn out great after that.
ive had some fast-growing weird looking plants -- leaves were nice and big, but floppy and bunch of pigmentation issues. Those plants rarely turned out well for me. I don't mind variegation, but if it is a significant symptom all over and other attributes that look less than healthy, i'm trashing it, nowardays. Am i missing out on a good plant occasionally? sure, but i'm also saving myself from a potential 12 week headache of dealing with a dumpster fire plant, too.
It's easier to throw something out if you plant more than you need -- which is tough to justify, if spending a lot on seeds. If still new, grow it out just for the experience.
i expect at least 1/4th of seeds to have issues of some kind from mutations to runts. if productivity is a primary concern, plant 150-200% of need and kill the weak. if not, grow out all the weirdos you want :P