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It is definitely looking happier in it's new setup, but unfortunately I do not think it has the ability to become a big yielder. It's lifespan is pretty baked in, so you have optimistically a few weeks to grow it out. You could get it to the size where it will provide a small, good quality yield in that timeframe so there is still hope 🙂👍

I don't think it is N toxicity. Usually all your leaves would be super dark green, and the very tips of the leaves would look like the are hanging down like a cat claw. Usually when leaves start curling up and flipping like that it means you have high temperatures and/or too much water. The leaves do that because they are working too hard to move water efficiently through the plant. If you have these issues in check though, then it is possible that there is some sort of root problem, but check these other things first.