Even for a series as fond of recap episodes as Nurarihyon, ending on one is pretty darn lame.
Sennen Makyou, by contrast, was effectively a shounen battle series. Not only were Rikuo’s classmates mostly absent, but his human form – probably 80% of the screen time in the first season – was mostly absent as well. With a shift to Tohoku and then Kyoto came a shift to youkai Rikuo, with Kana’s continuing role in the story due to her connections with the Keikain onmyouji clan in Kyoto. We got a lot of shounen chestnuts such as the training arc, and a series of confrontations with mid-bosses leading up to the final showdown with Abeno Seimei, who was the driving force behind the conflict that drove the season. Even Hagoromo-Gitsune, who looked like the main villain for a while, was effectively a mid-boss herself.
As to whether the anime will continue from here, I suppose like always it depends on commercial factors more than creative ones. The fact that DEEN elected to preserve the manga’s non-conclusion and finish with what effectively mounts to a setup clip episode seems to indicate that they’re planning to go back to the well at least once more. S1 mostly focused on Rikuo as a human child, S2 on his training to be a great youkai, so presumably S3 would be an opportunity to see him actually functioning as leader of the Nura Clan. Nurarihyon seems to have ceded control to his grandson for good, and I wouldn’t mind seeing a third season that was something of a mix of the first two – mostly this season, but with a few slower episodes and a hint of the comedy from S1.