I think the meta has never been more healthy and varied as it is now. Old Gods and now Karazhan have created numerous new archetypes and decks. Many classes have multiple viable options as opposed to the old days where you always knew what a Hunter, Druid or Warrior would be the moment you saw it.Sure you've still got Zoo and you've still got the occasional Freeze Mage but they're just one of many options now and Zoo is not exactly a static thing, either. The discard cards are being absorbed into what is essentially still a Zoo deck. The archetype just relies on cheap aggro minions and they're not going away no matter what is done to the Classic set.Based on how much change we saw from Standard I'm not sure why anyone would think the next switch wouldn't be equally game changing. Reno, Bran, Finley and Elise are pretty ubiquitous these days, not to mention the dragon synergy cards from Blackrock Mountain. It's nice to know that Blizzard are keeping their options open but I'd be very surprised if any changes proved necessary.
Making a banned or restricted list for standard like in MTG would be effective. Eg: Ban cards like power overwhelming, and doom hammer, and restrict cards that are too strong as a two of. For those unfamiliar with MTG, restrictions reduce the number of card types you can use to one. For instance, only one purify in priest.
"Powerful archetypes like Freeze Mage, Zoolock, and many, many more have a large percentage of their composition solidified year over year thanks to the evergreen set."Removing Classic cards would still leave a number of core cards in such archetypes which are Basic cards, e.g. Frostbolt / Frost Nova / Flamestrike for mages, totems and Bloodlust for shamans, Savage Roar for druids, etc. Removing Classic cards might hence not produce that many new archetypes, as the core of each class (using Basic class cards and hero powers) will remain the same.Also, Classic has so many cards compared to most expansions and adventures that if Classic were removed, any new expansion / adventure might need to include a huge number of cards to replace Classic cards.
I will start off by saying im not upset by the current meta in standard at all currently. Granted, there are some problem cards, but at the same time, look at the meta. What Thrombin said exactly. There's no one set deck youll be playing against with minor variations. Theres so many different strategies for each class now, it really livens up the game for me. Makes me feel more like im earning by victories by overcoming my opponent as opposed to just going through the motions and knowing exactly whats coming every turn, etc. Makes it interesting. I just have a few decks teched around problem cards in case i run into a whole bunch of a certain matchup in a day. People are always going to use broken cards, but i use that to my advantage. I'd rather sit on an answer for the inevitable all game knowing when they play it, im not screwed. Think one step ahead and plan. Try not to just overcome, but excel. Alls it takes to get to legend is a 51% win rate :]