I think the new tier system may be partially to blame. They are all unique in their own way and I guess many people either bad habits in like t1/t2 and dont learn by the time they level up. Havent been to lower tiers in forever, but I assume players go from base to base farming guardians (correct me if im wrong) without much strategy.
Oh and you cant forget EST made it easier for people to show up, do nothing, and reap some WExp. If minimal effort is required to get a reward, not many would bother with the learning process.
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