Aditya's a great new host. I'm impressed. Usually, newcomers don't impress me, but he's got that charming/welcoming touch.
However, there IS always room for improvement.
1) He tilts his head from side to side whenever he talks, as if he memorized what to say with a metronome by his side. It's a bit annoying once you notice it, but I do recognize his ability to be more animated rather than just stand up there and talk like a professor.
2) His hair-- meeyowza-- what manga hair! He should stop dying it so much and making it look so untamed. It suits some people, but just not him. His look is more of the 'cute & innocent' type. Natural styles would suit him better. And his Nepali ancestry's given him the 'slanted' eyes (for lack of a better term), so I definitely think a more relaxed hairstyle would finish off his look.
3) He struggles a bit with coming up with what to say 'on the spot' when something out of the oridinary comes up. You've all seen it. He should be able to cancel the negative effects by perhaps making a joke out of it if appropriate. His sheepishness is cute though.
He smiles often, talks clearly, and rarely messes up... overall he done well.