I think Sky have got away with it slightly as regards the CL. United went out early last year, and Liverpool didn't qualify. This year neither of them is in it and Liverpool aren't even in Europe. Those two clubs are the ones that almost guarantee big numbers for big European ties, as evidenced by Liverpool EL games out-rating Man City CL games on BT.
Sky will have been annoyed that BT had the big Liverpool EL games, but the EL has never really been on Sky's radar. In terms of CL, I think the overall level of general excitement for the competition waned last season with it not being on ITV and to a lesser extent Sky. BT did a good job with it IMO (and UEFA may well be happy with it) but the CL didn't feel like must-see TV alot of the times last season. I have BT and I watched maybe 6 games live, and none of them were group games.
So, in a way ITV and Sky losing the CL has not hurt them massively, because they were arguably what had actually made the tournament a big TV competition for the masses in the first place. Once they lost it the comp decreased in value and relevance to the masses. It must irk Sky to talk about teams fighting for a CL place when they know they cannot then show the end result, but the PL is so much bigger than the CL in the public's mind that having the bulk of the PL outstrips it.
As mlt says though, if their share of PL games is set to go down in future that may change the conversation. But if they retain the bulk of first and second pick games, and retain the marquee slots (Sunday 4pm and Friday night which I think will become huge) they'll be happy.
Put it this way. If you offered BT a trade right now of their PL/CL packages vs Sky's PL package, would they take it? I think they would, without question.