Given the statement by Anoushka, it would seem they're not a fan. If they were a fan of the practice, it's doubtful they'd be altering the matchmaker to reduce their advantage, take longer to match, and get tougher matches outright. They "firmly believe in good balance"
Also, from March (
https://forum.supercell.com/showthre...-Matchmaking):
It sounds like high level players preying on low level players with hyper optimized war bases was something they were interested in stopping (although to be fair, some of the changes that went along with that March statement had some, shall we say, unintended effects).
The quote from Jonas' stating "altering one's war weight is how the game is meant to be played" IS something that I have not seen however...