It will not hurt his development whatsoever to keep him in the AHL for nearly the entire season. Now, if he keeps up this current pace or better for a sustained amount of time, maybe it makes sense to bring him up but keeping up this current pace would be extremely impressive.
That being said, it isn't all about points in the AHL and he will still be learning a ton down there. Like, the Kings don't need to bring up Frk even though he's putting up good numbers. We want to see the numbers but there is more than just offense to learn before hitting the NHL.