Actually, I agree with you. I think any other visit in past years would not have been particularly covered by chinese media either, and it may not be a result of the sign of the times.
However I would argue that the US-chinese security relationship is at its worst, or at least at its most dangerous as it has been in a while, a result mostly of the disputed islands with Japan and the US-Japan security treaty.
Other minor improvements such as RIMPAC, or agreeing in principle on the conduct of unplanned encounters, as well as other smaller exercises between individual ships, pale in significance to the larger strategic shift of US forces, including the much hyped pivot to pacific, which (despite its relative average physical change in force dispersion so far) does indicate US intentions to the region and china specifically, in no quiet terms.
I'd say it hs been a gradual shift over the last six years from the pre existing security relationship to now. It was hard to notice the year to year change, but looking at it across from beginning to end I think the relationship has definitely deteriorated.
But I suppose that is off topic.
We can talk about this somewhere else, but I will point out that the Chinese Foreign Ministry's response to Obama's statement this week was a lot more muted than (at least I) anticipated. I think that shows China's willingness to give the US some wiggle room with regards to maintaining its alliances while bigger geopolitical concerns are afoot (Russia). Furthermore, one cannot emphasize a key word in that statement, which is "administered". So no, I did not see Obama's recent statements on this trip as any major shift. Furthermore, if we're going to talk about the security situation over time, the US's presence in East Asia has actually weakened very much compared to what it was in the 90s, so all this coded language about the US's "intentions" for China seems pretty silly from that perspective. But let's leave it all at that.