It has lots of healthy new, hardened, highly productive foliage to power root growth. This is a better time to get it out of the nursery soil than in spring, IMHO.
If is has a burlap covered root ball hiding inside that pot, I wouldn't even think of waiting until later to get the job done.
And put it right back into full sun exposure. The tree should flush vigorously next year so one could proceed with serious styling a year from now. But, at any rate, one will have the knowledge of the present root condition and the vitality of next spring's flush to control their impulses.
BTW, do we need to review how to properly secure a tree to a container of bonsai substrate?