I guess we both had vastly different experiences watching the two shows. I had the complete opposite reaction, especially with early USM .I have never been as frustrated week after week watching Ultimate Spider-Man as I have the new show. The new show is dreary and boring. Even when Ultimate Spider-Man was busy sucking up the joint it held my attention.
Hopefully whatever new X-Men cartoon we get is a step up from both shows (and Assemble).