17 points from 21 now
Yeah no doubt it will have been a disappointing season, but there's not a lot we can do about that so I prefer not to dwell on it. I am confident with the form we are now showing we will secure CL qualification, it's not ideal but it happens to the best of them - Chelsea finished third last year whilst Arsenal have been fourth more often than not in recent years. Personally I don't believe any of the 'big four' should get too up in arms about finishing fourth once, the quality they're up against means it's always a possibility. We just have to move on from it and do a better job next season. If we see similar form then that is the time I think real questions will need to be asked of Rafa, but not before.
I can't really say I've seen any 'worrying signs' this season though tbh. Plenty of crap performances but nothing to convince me there's a long term problem.
I agree that we should be ok for 4th in the long run, mate.
But where we're not on the same page is your "if we see it again next season" remark... This is the 5th time in 6 seasons we've been out of the title chase by Christmas. That's not a blip, it's a trend.