Complex sentence: Studies have shown that people with high EI have greater mental health, exemplary job performance, and more potent leadership skills, markers of EI and methods of developing it have become more widely coveted in the past few decades.
Split into simpler sentences: Studies have shown that people with high EI have greater mental health, exemplary job performance, and more potent leadership skills. Markers of EI and methods of developing it have become more widely coveted in the past few decades.