Of course, I also don't expect all Milan players to depend on Ibrahimovic. However, to reach the championship title, IMO, Milan must have Ibrahimovic at least 50% of the remaining matches, its mean Ibra must be played. Unless, in the winter transfer window there are younger and more qualified forwards, then, even though Ibra does not play, Milan still has a striker to score more goals.
Ibra came and changed them. He brought not only goals but also confidence to his young team mates. Together they have been improved in last 3 seasons and they have a first Champions League season after many years.
In Serie A, they are at the top of table. Also I don't see in Serie A, AC Milan are depending too much on Ibra. He did not play too many matches for them because of injuries but AC Milan still stay at top. Good enough and dependence on Ibra is decreasing.
Xavi is still trying to continue that Tiki-taka style of play and i dont see where this plan is heading to. If Barcelona stick to that outdated game pattern of Tiki Taka they are likely to suffer more losses.
It is not out-dated and Manchester City are playing another variant or upgraded tiki-taka. Issues in Barcelona are their players are not at world-class like when Xavi is core of their squad and tika-taka. Don't blame this defeat on Xavi. Remember when Messi was here, Barcelona was destroyed more terribly by Bayern. Give Xavi and Barcelona time to digest this defeat and come back.