Next season we likely need minutes for guys like Skipp, Tangana, Parrott. Sessegnon, Cirkin etc. and can't afford to give them too many minutes in the EPL with the weak team that we have. We also could use it as a way to recruit a back-up striker that we have desperately be needing. Having Europa League games would help alleviate any concerns about playing time. With the top 4 (City, Liverpool, Chelsea, United) looking to be very difficult it also offers us another way into CL. Plus there is always the chance of finally winning a trophy.
Next year seems like an even better year than most to be in the Europa League.