That's quite an interesting opinion/thought you have on it, quite similar to mine in fact, but one thing in particular is vastly different for me.
Good (in order from the best to the least best):
The Maps - The map s were absolutely amazing, as soon as I jumped into Forge I ran around remembering the times that I had a blast on The Pit (Now Pitfall), the iconic features of the map brought back hundreds of memories I had of the map. The little shoot where the Sword spawned in The Pit was a good change to the map, would make for very good KoTH moments when the Hill is under that room. There is one thing I find very disappointing about the map though, the lack of the two "secret" hideouts up high each side of the map. Those were awesome to spawn in and kill people from, it's a shame they took away that area, because Jet Pack would've been very useful to get to that place.
Armour and New Armour Skins - These are quite fantastic, except Ricochet, I genuinely hate that armour variant. The Prefect armour looks wicked and the Mrk5 and ODST variants are great for people who loved the old H3 armour. The skins are quite awesome too, the best being Bayonet in my opinion for the Venator armour class. Though, I haven't tried every armour, so I can't comment on all of the skins. However the ones I have, they're pretty darn cool.
Weapon Skins - I quite hon estly thought these were terrible before purchasing the DLC Bundle, however when I downloaded it and went through my loadouts, my opinion changed rapidly. All of a sudden, they looked awesome and when I tried them on, they looked just as good in first person as they did in a 3rd person viewing. I love the Trauma skin for the Assault Rifle in particular, it gives me a ruthless look about me and how I kill my opponents (I wish).
Stances - These aren't overly great, but are still pretty cool. Some do look pretty stupid like the Loyalty one and also Lookout, but they still add variety which is something that stances lacked since everyone went with the highest 'ranked' one they could get. Personal favourite is Flank, makes me look like how I play, a silent assassin.
The Meh:
Ricochet - This gametype though I haven't played it doesn't seem a whole lot of fun in my opinion, to people who aren't American Football fans, this doesn't exactly have the same sort of appeal and seems very meh. It's not bad by any means, another gametype to muck around in is always nice. But it's certainly no where near the great gametype everyone keeps saying it is, in my opinion from watching games of it.
Of course my opinion isn't as proper as it could be, if I actually played it, but lack of XBL Gold prevents me from doing so.
The Bad:
The bugs - not as bad as the Season Pass DLC packs of course, those were horrendous, and looks like 343 did a good job of fixing those so they don't happen again. However, there were some other bugs that weren't taken into account for, such as the forearms not being the same as set in the settings when playing. This is a terrible bug and must be fixed quickly, there are also numerous other bugs, but I won't mention them since this isn't a "Name your bugs thread".
Spartan Ops missout - the fact that 343i did not make the Spartan 4 armours carry over to Spartan Ops and have no plans in doing so is a massive downfall for this DLC pack, this would've been great if they had common sense and made it for all game modes, not just War Games. However, it's not something absolutely vital to the game, and can be looked over, unfortunately.
Conclusion:
By far the best DLC Halo 4 has had, and it's good they took their time to fix past bugs and add things that people would genuinely want this time. The massive variety 343 Industries added for player customisation and the maps are fantastic, shoutout to Vertigo. Though the bugs and lack of Spartan Ops interaction is a let down, this DLC is well made and thought about, and I'd certainly give it a 8/10 for what it is.