It's an interesting question. On the evidence you would suggest that it was. No team has retained the 'Champions League' since the European Cup was rebranded in 1992. Prior to 1992 that was pretty much the norm.
But it really depends how you look at it.
'Back in the day' you didn't get any second chances in the European Cup. If you lost a game you were pretty screwed unless you could turn it round in the second leg. These days it's a little more forgiving. If you get drawn against someone pretty handy in the group stage and they give you a bit of a kicking then so long as you can beat the other two sides in your group then you'll be OK. Just look at Man City getting taken apart by Bayern last season. Although they very nearly did actually turn it around, and perhaps could have had they been able to do their sums.
You couldn't have gotten away with that pre 1992.. losing 3-1 at home pretty much meant you were out of it, it still pretty much does once you get to the interesting bit after Christmas.
In 1978 Liverpool drew Nottingham Forest and got beaten 2-0 in the away leg, and that was that. Two successive European titles and the run was halted by the first game of the season.
From that point Forest didn't look back.. winning it that season and keeping it the following year. Nottingham Forest did that.. won the European Cup and kept it. Pretty compelling evidence for it being easier then.
And this is also the reason "We hate Nottingham Forest.." always sounds a bit weird that these days. Especially how they get top billing over Everton and Man Utd.
It was almost the polar opposite to now.. teams were able to dominate then. From 1971 until 1980 only 4 different teams won the European Cup, but perhaps more significantly they took it in turns keeping it. Ajax 71 - 73 (three times), Bayern 74 - 76 (three times), Liverpool 77 -78 (twice), Forest 79 - 80 (twice).
So it does beg the question what changed?
Well it's pretty obvious that there are more stronger teams in it. When you consider England, Spain and Germany put in four sides each plus 3 Italians.. well there is just more stronger opposition now.
Before you could have got away with just meeting one or two from those countries.. these days to win it there's a fair chance that your road to the final is going to feature a few from Europe's stronger leagues.
Teams do still seem to have periods of 'domination' but there just not quite as... well, dominant.
It looks as though Bayern are wrestling the domiination away from Barca at the present, a 7-0 aggregate win is pretty compelling evidence. Barca did dominate.. no question. Beating Arsenal ('06), Man Utd ('09 and '11). And before them it was Milan.. winning in '03 and '07 and another less successful final appearance in '05.
Maybe we just have to redefine what counts as domination.. but that doesn't really answer my question. What has changed?
It seems to be a matter of the edge that teams gain by being in the European Cup. When Liverpool dominated (just for example), they had an advantage over the other teams in England by being able to test themselves against the better teams in Europe. Learning new tactics and it made them a more attractive proposition for potential new signings.
Now the same is true these days.. being in the Champions League males you a better proposition, but you are in there with 3 other teams from your country. So less of an advantage. Imagine for a moment (now bear with me, this is going to get horrible) that Man Utd had dominated in England with the European Cup in the old format.
With pretty much a monopoly on European Cup football amongst the English sides... like Liverpool had in the 70's and 80's then it is entirely reasonable to to assume that they would have won a few more European Cups as well.
Indeed it is only their misfortune to have the best Barcelona team in history to play against.. they would most likely be on 5 European titles and Ferguson would have actually achieved his mission to de-perch Liverpool.
But they didn't and the world is a happier place for it.
But there is a flip-side to all this... it does seem that these days you can blag your way to a European Cup.
Just look at Liverpool in 2005. Pre '92 that side wouldn't have come close to a European Cup. Finishing 4th in '04, getting through the group stage by the skin of Gerrard's right boot. Losing to Graz at home, Monaco and Olympiakos on route.
It picked up after Xmas when it turned back into a more old school competition.. but a side containing Igor Biscan and Djimi Traore wouldn't have got a look in previously. Largely because you had to be a much better side to get in it in the first place.. a side that finished fourth in the league wouldn't have been that close to European football.
So it's a bit paradoxical. It seems easier to win, because you don't have to be as good as you used to to win it.
But that's also the reason why it is harder to win - or at least to keep. Because they just let anyone in it these days, there's more competition.
This theory of course will most likely be blown out of the water when Real win 11 and 12 in the next two years.