I don't know why a portion of this fanbase keeps getting worked up over the possibility of managerial change. It's routine stuff, in fact clubs that football fans often envy in terms of how well run they are don't hesitate to pull the plug on their freshly appointed managers all the time. This season alone;
Dortmund sacked Sahin,a longtime former player of theirs mind you, after 6.5 months.
Milan sacked Fonseca, who had replaced their former title winning manager Pioli during the summer, after 6 months.
Roma sacked club legend De Rossi after 8 months, replaced with him Juric, and sacked him after 2 months as well.
Feyenoord sacked Priske after over 7 months.
Managerial change is not inherently destabilizing. Nor is there an arbitrary length of time, measured in years, a manager is owed before he can justifiably be sacked. It's a moot point in the context of this debate anyway, as Ange is already given more than enough time to show his worth.