the reason people "groupthink" and don't try new things is the cost of this new trial. think of it this way, to level valks to max it takes 36 days and 180k dark elixir. if this is a new trial do you really want to invest that much time and dark elixir into a test that might not turn out well? on the other hand you know gowipe and lavaloon is a proven attack and works time and time again as long as its executed properly. what would you choose to upgrade first?
you sir are an innovator, taking a risk and using something that isn't the norm. others not so much but can you blame them.
oh and before you say it i know you can use them at lvl 1 without upgrading them but even then you have to be sold on them enough that you can ignore every other troop and think "valks are the best thing to upgrade right now" or else they just stay level 1 while you upgrade other things. as far as clan wars are concerned you have to be sold on the fact that using valks is your strongest attack or else you are attacking way too low or just messing around not trying to win.

