I'm perplexed. Why? easyJet is a big MAN customer and operates far more flights and brings more customers to the airport than KLM. My point being that you don't just treat one of your biggest customers with contempt because you perceive they deserve/want a lower customer experience. By the same token, KLM etc might not want to move to terminal 2 yet for whatever reason. Instead, as an airport, you work with the carriers to best match their needs and requirements. Pre-pandemic, Eurowings moved to T2 and easyJet takes pride of place at the new BER terminal.