Care to elaborate, and maybe provide some *constructive* criticism? Just saying "this is bad" as a question doesn't make it helpful.
I like the OP's ability progression, but it's really geared towards a "I'm just the base Fighter, but I can spell-bonus my attacks," which works well fluff-wise and makes sense, given the base Fighter's abilities, but (I think) seems underwhelming. Granted, we haven't seen the spell list you're providing, but unless the cantrips are buffed somehow, I think it may be underpowered. Maybe increase the effective slot level (ESL?) for the spell when cast this way? The fluff for this could just be that you imbue your weapon with spell slots equal to your... BAB? INT mod? CHA mod? Not sure here. I agree with Yakk that your progression is essentially just "make an arcane focus," "attacks + spellcasting," "attacks + more spellcasting," "attacks + MOAR spellcasting," which is a little boring. IMO, Yakk went too far in the opposite direction and (to BRKNdevil's point) re-did the class with more OP abilities. Maybe replace an ability (and/or part of another) with the ability to create a lesser Bonded Weapon. Overall, I think my review won't be complete until we can see your spell list. In case you didn't know about it,
http://mouseferatu.com/index.php/news/august-8-2014-a-special-gift-for-my-fellow-dd-fans/ could make the process of selecting spells much easier.
P.S. I love the idea of using the Bonded Weapon as an arcane focus, very Bard- or Cleric-esque.