There are always going to be the really strong decks - if you break those, there will be new decks that become "best". The meta right now feels really rock/paper/scissors, in that there some strategies that break others, but are weak to another set. This is good for a fluid game, as there are a variety of viable options.
There is always the option to subert expectations. Last year's West Coast guys did the Hate Bear thing, which was unexpected and highly successful. I went with CtM as it seemed clearly strongest, but played against a bunch of shaper decks teched heavily for it at Worlds. In 2015 I made a Val deck that looked like the prevalent DLR, but was actually an all-in Siphon spam deck and helped get me to Top 16 as it confounded the expectations of players who thought they knew what was happening.
Even if there are "top dex", that is in itself a weakness, as the player base comes to rely on what they hive mind thinks - by changing a couple of cards, or disguising one deck as something else, you can get good results.
I really like deck building, although I know a lot of people don't, but even if it's just one or two cards different, that can be really interesting (to me).
If we're talking casual games or down the shop stuff, it's quite easy to do the whole social contract thing and say "look guys, no one likes , let's agree not to play that on club nights". We've also had a lot of success with having Core-only, onesies, and Cache Refresh tournaments mixed in with the normal schedule. Also, the n00bs set up their own Pubrunner nights where they only play Big Boy Teaching Decks or some other thing, so they can have a specific kind of fun without so-called "OP Regulars" spoiling it for them.
I think the alleged new MWL every three months or so would be good for the game. A more regular set of checks and balances on the competitive scene helps mix things up. A comment I've seen a lot recently is "I don't know how to build a deck any more" - I view this as a feature, not a bug.
From first blush, the significant changes mean we've got a lot more scope for deckbuilding now and what might be good, with a lot of the "must have" cards being rotated, banned or restricted. If FFG keep up with the keep nudging the list, it'll be like trying to work out how to tightrope walk, while someone keeps poking you, and I like the idea of having to frequently rethink what goes in a deck.