I, for one, am sorely disappointed.
When Xros Wars started, I defended it. I thought the first few episodes, though not satisfactory story-wise, were fun and benefited from modern animation techniques and improved production values. And then it just kept going. The characters were still shallow and annoying, the villains were still boring, and I just didn't care about its dull excuse for a plot. I had to stop watching because I was so disinterested. This has never happened to me with any Digimon series ever. And I know this isn't just because I watched the earlier ones when I was much younger: I watched Savers and Frontier only three years ago at age 15, and I still thought they had well developed characters and an interesting story for kids' shows. With Xros Wars, not in the least.
I felt that the human element was largely missing from Xros Wars. There were a lot of quiet moments about the characters and their interactions with each other and the Digimon. And in some of the series they really demonstrated a number of thoughtful moral issues (for kids' shows, mind you) without diminishing the suspense. Xros Wars, on the other hand, was just loud. That's what it was to me: a bunch of noise and bright images designed to distract the kids from the fact that there's no story. That's what my friends and I in first grade loved about Digimon when it first came out: In addition to all the awesome monsters fighting, this was a show about ordinary kids with families, problems, personalities, and quirks. We all had our favorites, and we were genuinely happy when they overcame their problems, saved the day, or did both at once. We cheered when Ken repented for his wrong-doings and joined the good guys, and we cried or came close to crying when Wizardmon sacrificed himself to save Kari. Even when I watched Savers as a cynical teenager, it made my lower lip quiver to see Ikuto (Keenan in dub) save the human mother he never knew.
tl;dr: I thought Xros Wars was shallow, flashy, and hollow compared to previous Digimon series, and I'm not happy to see that it's continuing.