I don't also see Tottenham winning this league and i don't put my interest on the odds given by the bookmakers because I think we might see another club winning Europa this season just as we saw Atalanta surprised everyone last season.
With the current performance of Manchester united no one can tell if they will improve in performance in the long run but if it is with what they are playing now, I don't see them in the finals. Tottenham is also unpredictable. I think it is too early to conclude.
You are right because Europa League is different from other leagues that is very easy to predict and besides that's how we predicted Liverpool and some other clubs last season to win the league and they all failed to perform well and surprisingly the least club we expected emerge as the winner, so I wouldn't argue with you about other club to surprise us this time again but for now since we have not been able to figure out the exact club we would still stick around with Tottenham Hotspur because they are the right club I can think of right now even if they are not doing well on the premier League but the Europa is different from that and we also have teams like Besiktas and Olympiacos and so more interesting clubs that can also be very promising.