What I doubt you'll ever see from Paizo is a class that's overpowered compared to the "core" ones. If what you want is the third option listed in one of my posts above, except with the spell progression of the bard, instead of the paladin or ranger, and a spell list focused on direct damage, then you're probably doomed for disappointment. I don't think Paizo will ever publish a character class with full BAB and medium armor, but better spellcasting than any other "core" full BAB class...No one is saying that they want a class like the one you describe.Only the ones holding the 3.5 duskblade up as the standard. There are also several who are stating they want "full BAB, medium armor, spell progression as a bard."
You may not want that. I know I don't. However, there are those who do.
I happen to be one of those Dragonchess Player is mentioning, and I stand by my view.
Do I want the class to be more powerful than Paladin's and Fighters? No, that I do not. However, take a hard look at the Paladin's ability sheet. By my analasys, as long as our power level remains under that of the Paladin we're fine.
Don't you think you can swap some of that total amount of "Paladin Mojo" for one or two extra spell levels and starting with casting at level 1? I'm not saying it would be easy, but the fact of the matter remains that it's entirely possible to do so in a balanced manner. Wouldn't bother me if the final piece ended up somewhat weaker, so long as it was viable.
Hell, with the right spell selection we could get away with full BaB and Caster Level, with up to 9th level spells and still be balanced, aiming lower is just easier.
Just thought I would add for those of you requesting a bardlike gish class. There is a class in Adamant's Tome of Secrets (PFRPG version) that is pretty much a self buffing bard with evocation spells and sword spank. I believe the class is called spellblade or arcane blade. I cannot remember which off the top of my head. But it might be just what you are looking for. Who knows? One of my players brought one to my playtest game (for the oracle and cavalier) and it was working really well for him at level 3. It had a bard spell progression (with access to choose from sroc/wiz list unrestricted), at thief BaB, 2 good saves, and class abilities that seemed to be focused on buffing the weapon of the gish (not certain on exact durations or times per day, but it something of the order of 5-7 times daily, with a duration of 6+ rounds, but I cannot remember the exact number, but it was modified by INT bonus). Its casting although spontaneous was also based off of INT. Seemed like pretty rounded deal.
love,
malkav
edit:just thought I would mention it while the PDF is still 1 dollar.
I have tome of secrets and its a decent attempt but it falls really flat. Having the primary feature of a class thats supposed to be a fighting type heavily penalized for having a level appropriate magic weapon is poor design. It also has several dead levels compared to the bard. Like i said, descent attempt but falls flat.