You have access to the books and conversion material? Or are we stating this as an impression from what has been leaked?
Regardless, I think you need more options.
Some characters are going to look a lot better in 3.5 than they did in 3.0, from what we've seen so far -- druids, bards, monks, and barbarians will probably be better off than they were before. Sorcerers will probably look a tad bit better, as well.
Some characters won't see much of a change at all -- clerics and fighters will probably see little change from what we've seen so far.
Some characters (or more specifically, certain build-types of characters) will be probably be weaker -- spellcasters in general are going to see a hit in some areas, a boost in others, so it's hard to judge without the entire revision.
Finally, some characters will be different animals all together -- the ranger and, to some extent the paladin, will have very different abilities, hit points, and skills. Trying to compare will be very difficult, because overall much of these characters will change.