Though I don't have all that much to add. Most of my concerns match those voiced by others -- most notably "I don't want twitch combat in my MMO" and "I don't trust Jack Emmert to not screw up the design an online rock-paper-scissors game." I also think that many of the people who are most (annoyingly, in-your-face) exuberant about CO are some mixture of:

1. Official CoX Forum trolls who have an axe to grind with the City devs, and are taking the opportunity to take potshots at a game that they (oddly enough) haven't stopped playing or paying for. These are the people I try to ignore completely.

2. People who have been mezmerized by the siren song of things they really want in City (full power customization, AT-free character construction, arch-foe system) and haven't yet come to terms with the idea that CO will not be "everything I like about City plus all these good things, too." It's pretty clear that CO is going to be a lot different than City, and some things will, inevitably, be implemented in a worse fashion (based on any given point of view). For that matter, everyone's imagining character construction and the arch-foe thing will work in the manner they most want it to. I don't mean to shackle these peoples' buzz -- some of them will be genuinely pleased with the final package, after all -- but when all of the implementation details become known, a lot of people will be disappointed. It's unavoidable.

3. People who have forgotten, or never knew, what Jack Emmert meant to City of Heroes (and I mean that in every possible interpretation). Jack had -- and has -- some brilliant ideas. He also had/has some atrocious ones, and has the PR skills (and self-restraint) of a parrot sharing a house with Bob Knight¹. He's Steve Jobs without the charisma, and he desperately needs someone to save him from himself. Matt Miller (Posi) did that, I think, as much as was possible. It's not clear to me that anyone in the new organization will.

All of that said, I will sign up for the beta if I can, and I will give it a try. But it all comes down to the fact that I still really like City of Heroes, after all this time, and CO's going to have to seriously knock my socks off to get me to switch.

¹It's March, and I'm a basketball fan. Forgive me the sports reference.