I'm pretty sure I can fit something into the currently proposed limits. In general I'm in agreement with jas on the issue of Speed, so nothing to add here. More speed just pushes CAP5 towards being a status-immune bulky attacker or an immovable setup wall - the reasoning alexwolf has given 'you then LumRest before the 2nd Draco Meteor' is a strategy I'd rather not see CAP5 doing, because then it can work out that way and better against too many of OU's special attackers overall.
That said, I don't think of Speed as a dump stat like some others would prefer. I could run low Speed but I see merit in outspeeding Politoed and underspeeding Heatran. If CAP5 has the kind of Speed that it'd need to invest in it to counter Politoed but invest in bulk against Lati@s that it can't outspeed then we might further make the players specialize and make a choice 'who to counter', right? It's with this in mind that I want to see CAP5 get a reasonable speed stat.
I'm a casual Smogoner that mostly frequents the forums - chances are you won't find me on IRC that often. If you want to talk shoot me a PM please, I'm not on every day but I'll eventually reply.