If we get top 4 and win FA Cup too, then I agree. Otherwise, Ole’s second season* has been better IMO (more points, second place, getting in the final of Europa). I honestly do not care too much for the League Cup, it is a third-tier trophy where clubs play their reserves and young players till semi final or even final. It does not define a season for good or worse. It is obviously better to win it than not (especially since we are starved of trophies in the last few years) but it is still the least important trophy.
* Saying that, I think that this season felt better than that one, but then I would say that Ole’s first season (despite being less successful) felt better than the second one.
Still, for me a lot depends if we get top 4 or not. If we get it, I would have this as our second best season (after first Jose season). If we somehow even win the FA Cup, then it can be argued it is the best. If we miss top 4 and get humiliated in the final, then for me it is right there with second Van Gaal season, a trophy (a smaller one than Van Gaal) but a failure (still better than Moyes season, Mourinho/Ole** one and Ole/Rangnick season).
** Although the night in Paris is by far the most memorable match for me in post SAF era. Which tells you all about the second rate trophies (Europa, FA Cup) or third rate ones (League Cup).