I'd rather just not see the series continued. Much like Bendis, Millar has defined and created this corner of the Ultimate Universe, and we've seen the inconsistencies and such that happen when other people take over his work. Imagine how much information about the Ultimates Millar must have in his brain, and imagine how long it'd take to bring another author up to speed. And while you can debate the merits of the artists all you want, it wouldn't be Hitch's art anymore, and therefore, it wouldn't look quite right to me. I would much prefer the series to ride off into the sunset on a high note than let a substandard team take over just so Marvel can try and keep raking in money.