I wasn't really expecting a great deal from the anime, so I was satisified. Although I was pleasently surprised when the overall plot appeared towards the end, with there being stand alone stories with each episode. Although the last faceoff didn't reach its full potential.
But in all fairness when Dante can jump away from impalements, smirk and taunt, its kind of hard to give the man a worthy adversary.
*cough*Vergil*cough*
But with a second series (in my opinion anyway - if there was oe) they could recycle the characters and story from DMC2 since it looks like Capcom are going to forgot that game was ever made and make that plot into something more worthwhile. But if there was another series then they'd more likely have it as a prelude to DMC4, which could be very cool. Explore the Order, Nero/Kyrie, what the hell Dante is doing...
But these are just my random thoughts.