Sure, it ain't quite Borderlands yet, but hot damn that's a lot of gun customization. The number is quite inflated due to tons and tons of camos (it's like 10+ camos per environmental type like woodland and urban). DICE released a little video to help visualize the process of Gun Customization. The menu looks a lot better than what we had in BF3. Hopefully it will work well with the gamepad too.
I'm a bit disappointed that suppressors are available to all kits though. I find suppressors to be detrimental to online multiplayer games, because they mess with overall feedback, and make gameplay feel a whole lot more random. In BF3 they were handled especially poorly, because not only did it mask the audio profile of guns, but it also reduced pretty much all visual feedback to zero, as well as adding even more benefits (less horizontal recoil), whilst the downsides are negligible on most maps (slower flying projectiles, more drop, less hip accuracy - I believe). With 3-4 hits to kill and high speed bullets, it just didn't feel like a game anymore. Reactive gameplay? Forget about it.
At least I can still hope that they'll handle suppressors better in BF4. Despite me disliking the concept in the first place, that's still in the realm of the possible.