Suppose that the Treaty of San Stefano is upheld, for one reason or another - either because the vehemently anti-Turkish British prime minister Gladstone keeps his office in 1874 instead of losing it to Disraeli, or because Bismarck supports Russia in the Congress of Berlin - and a Greater Bulgaria is established.
Since there already have been some discussions about the international effects of this alternate Bulgaria, I'll ask a different question: what could its internal politics look like? Would it still have Alexander of Battenberg as its first monarch, and if so, would he have a better chance of keeping his throne ITTL?
Last but definitely not least, what would happen to the Muslims in Bulgarian territory? From what I know they'd be a sizable percentage of the population, at least a third.

Since there already have been some discussions about the international effects of this alternate Bulgaria, I'll ask a different question: what could its internal politics look like? Would it still have Alexander of Battenberg as its first monarch, and if so, would he have a better chance of keeping his throne ITTL?
Last but definitely not least, what would happen to the Muslims in Bulgarian territory? From what I know they'd be a sizable percentage of the population, at least a third.