Taking the east-west comparison a bit farther, I feel like the problems LalaRu is seeing would be lessened if we took a leaf out of the JP approach and encouraged more use of Party Finder over DF for people still progressing through the game (which was recently suggested on these very forums by a player on an EN datacenter and deserves more Likes). If anything, S-E could address this further by lowering the rewards for roulettes (which inherently encourage speedrunning) and raising them for new player bonuses, while keeping kick intact so those who don't play nice can be sent on their way. The current new player bonuses are mostly poetics which veterans rarely need, or WT points which I'm always capped on anyway.

(Disclaimer: I am not saying that Japanese people are superior beings. I am saying that they have figured this particular problem out better, though. Speedruns and clears are handled completely differently so nobody ends up mad.)