I completely agree with uchiha aleksanadr, moreover i just think the current anime (compared to the old episodes) is crap.
Ever since there came a new bureau responsible for the anime (during shippuden somewhere...) the anime took a deep dive.
It is not even anime, it is just taking the pictures from the manga, adding colour and sound. This has nothing in common with a good anime. From anime you'd expect more, not just the pictures from the manga, but more movement and action.
A shame, because i really loved the anime at first. Just remembered the joy i felt when Naruto went kyubi first time (againt haku), i felt very excited.
The arrival at konoha and first atack of Naruto against pain was a moment i was looking forward to for the same reasons. But actually it was (relatively speaking) a dissapointment.
I believe it is somewhere around the death of Asuma that they changed whoever makes the anime. (Those episodes are even worse!) Wonder why it's chosen to take this path with the anime, probably just collecting money and cashing out on Naruto. They put a lot more effort in the movies in my opinion.
So, in my opinion this has nothing to do with maturity or getting more serious. The content may be, but the quality of the anime itself is very bad.