I'm curious if Malaga still gets that birth if Sevilla beat Barcelona this weekend. From reading about the Liverpool possibilities last week, it seemed like England would lose a Europa spot if Liverpool qualified for it but then got Champions League through winning the Europa. If Barca wins and Sevilla would not have qualified for anything in Europe, their CL spot is an additional spot for the league, but if Sevilla wins and rightly qualified for Europa, their extra CL place may come at the expense of that EL place.
Since it's a different league, I'm not sure of any of this, but that was my understanding about what would have happened if Liverpool finished 7th, the Mancs win the FA Cup, and Liverpool would have won Europa.
I'm seeing conflicting sources on this. Wikipedia's Europa league article for
next season agrees with your analysis, and says:
"Since the winners of the
2015–16 UEFA Europa League (which automatically qualified for the
2016–17 UEFA Champions League),
Sevilla, also qualified for the 2015–16 UEFA Europa League as the seventh-placed team of the
2015–16 La Liga, their berth in the Europa League is vacated and not replaced by any other team."
However, the previous year's Europa League article says:
"Should the domestic cup winners qualify for the Champions League, the cup runners-up will no longer be granted a spot in the Europa League, and
the spot will be given to the highest-placed team in the league which have not yet qualified for European competitions."
But I think that situation (domestic cup winner already qualified) is superseded by Sevilla's winning of the EL, because it notes Sevilla's own situation this past year:
"Since the winners of the
2014–15 UEFA Europa League (which automatically qualified for the
2015–16 UEFA Champions League),
Sevilla, also qualified for the 2015–16 UEFA Europa League as the fifth-placed team of the
2014–15 La Liga, their berth in the Europa League is vacated and not replaced by any other team."
So yeah, I'll retract my statement and say it looks like Malaga is SOL.