To start I will clear things up that Konami has switched new banlists from semi-annually to tri-annually (presuming that is a word).
http://www.yugioh-card.com/en/limited/Forbidden:Dragon Ravine: Personally I never saw Dragon Ravine as a problem. Sure it helped Dragon Rulers a lot, but they will not be a problem anyway and banning Dragon Ravine will not make it any more of a problem (I will talk about Dragon Rulers as a deck being gone shortly). Sure it helped Dragunity get a level 8 synchro every turn at the cost of one card (plus ravine itself), but that required good luck with combos in other cards and it drained the normal summon for the turn. A level 8 synchro just does not seem enough to ban.
Return from the Different Dimension: I am saddened by this for nostalgic reasons. Every time I see this card I thought of Yugi Moto's epic play in the movie. However I must agree that this card needed to go. In most decks it was so OP that pulling it off was normally a sweep.
Self-Destruction Button: This card was really troll, but also didn't really help. The ban of this seemed unnecessary. If anybody can give a good reason as to why this card is banned please let me know.
Sixth Sense: The card being unbanned is ridiculous to me... This card can give a player such an unfair advantage, especially now that milling is not a problem. Honestly Sixth Sense should have stayed banned.
Limited:Blaster, Dragon Ruler of Infernos
Redox, Dragon Ruler of Boulders
Tidal, Dragon Ruler of Waterfalls
Tempest, Dragon Ruler of Storms: The four Dragon Rulers got limited. I am sure many are happy for this and I think this is fair. Because of these guys limitations I see no point in Dragon Ravine being banned. There is not much else to say on the matter.
Debris Dragon: Really this card I have not seen be abused in any manner. If somebody could try to explain to me why it is at 1 soon I would appreciate it.
Magician of Faith: I also fail to understand why this girl was brought up to 1. It has a loop. It is just like sixth sense, it should have stayed banned but was returned anyway.
Divine Wind of Mist Valley: They already limited Genex Ally Birdman, thus basically removing the Divine Wind OTK. Divine Wind of Mist Valley was not too much of an issue. Harpies would sometimes run it, but it didn't always work out. I suppose when it did it was a harsh thing to experience. I think keeping at 3 would have been fine and putting it at one was unnecessary.
Final Countdown: I know everybody is happy about this. Goodbye Final Countdown decks! This was one of the most annoying decks I have ever fought against and my only hate towards this is the fact it is at one and not zero. One will do enough damage though.
Sword of Seven Stars: With the limiting of sword of seven stars I fail to see any reason to limit this card. It thins the deck out by 2 cards and doesn't put the opponent at a card advantage, but it also has a cost of a level 7 monster making it more difficult to pull off. The Dragon Rulers are why this card is at one now but with the dragon rulers at one themselves, why bother? It is just a modified trade in.
Spellbook of Fate: Spellbooks were still very annoying and I do believe limiting Spellbook of Fate is a great idea, considering it is an easy to get to card that stops just about anything except an activation.
Semi-Limited:Chaos Sorcerer: Chaos Sorcerer in particular is not that overpowered. Now this finally makes sense because it is at more than BLS. Chaos Sorcerer is a good card to be increased up to two. I think it should stay at two however. The banishing effect for a relatively easy summon is a reason to keep it at 2.
Lonefire Blossom: They are really pushing getting the plants again. I am extremely happy for this as plants needed a boost. I am also happy because it is going to help my Sylvans quite a bit! There isn't much too overpowered about this card. It can special summon some 2700 beatstick with some effect for the cost of itself and a normal summon. There are many worse cards to go against such as Master Hyperion whom is at three. The only thing with lonefire is it can be special summoned for more monsters. Honestly there are not that many good plant monsters. This card should go to three in my opinion.
Unlimited:Archlord Kristya: This monster prevents special summoning of all kinds and is a 2800 beatstick. Not only this, but as long as this monster is sent to the graveyard it can be sent to the top of the deck to recycle it if the opposing player gets lucky with ryko, mirror force, etc. Honestly I think this card should have gone to 1, not 3.
Mezuki: Zombies so far are not doing so well and am glad they are getting a boost.
Plaguespreader Zombie: This monster is special summoned at a hefty cost for a level 2 tuner. I dont know why it was at two, let alone one to begin with.
T.G. Striker: Just another monster to special summon itself if the opponent has monsters and the player using this does not... There are many cards with this effect that are better. This going to three is well reasoned.
Tour Guide from the Underworld: This card was good at two. This is a one card Zenmaines , leviair, fortune tune, etc.
Constellar Ptolemy M7: I honestly do not see why this went down to one. Yes it recycled good cards, but I never found any use for having more than one in the extra deck anyway.
Fire Formation - Tenki: This is an improved RotA. This card honestly should go to one in my opinion due to it being a general searcher.
If you have any responses or want to post your own opinions please do.