"No Second Balkan War & July Crisis" Topic

Sorry if this has been asked before.

Lets assume saner heads prevailed in Sofia and Bulgaria accepts the status quo at the end of the (First) Balkan War. This gives Bulgaria more territory in Macedonia and Thrace than she ended up with after the treaties of Bucharest and Constantinople. Since the Bulgarian Armies were not tied down fighting the Serbs and Greeks neither Romania nor the Ottoman Empire are emboldened to attack Bulgaria in 1913. Russo-Bulgarian relations don't deteriorate to the extent they did in the OTL.

So after Franz Ferdinand is assassinated would Russia, having better relations with Bulgaria, have felt the need to support Serbia?

Would Romania have stood with the Central Powers in 1914 rather than declaring neutrality?

Would the Ottomans have insisted on the right to attack Bulgaria to recover territory in Thrace as part of the terms of its alliance with the Central Powers?

Assuming events in 1914 followed the OTL would Bulgaria have been more or less likely to have joined the Central Powers in 1915?

I think Russia would still support Serbia as part of Pan-Slavism. Serbs are a useful thorn in the side of both the A-H, and Ottoman Empires.