The Ottoman Empire with the borders of 1914?
The Ottoman empire with the borders of 1914 would be richer, and wealthier than today. However to what extent is not capable of being predicted, and one will have to take leaps of faiths to determine that.
First and foremost, the Ottoman Empire in 1914 had recovered somewhat from the Balkan Wars. The yearly deficit was decreasing every month, and the Ottomans had increased their payment of the ottoman public debt administration by 18%, which according to the British deputies in April, 1914 meant that the Ottomans could pay off their entire debt by 1925 and end the OPDA for good. Considering the behemoth of debt that the Ottomans owed to the OPDA, that is a massive compliment in favor of the Ottomans. The Ottomans were also going on a railway building spree and road building spree. From 1910 - 1914, the Ottomans built around 1800 kilometers of road throughout the empire and replaced around 700 kilometers of older roads not suitable for modern motorways. The construction of the Constantinople-Angora-Mersin Railway, the Baghdad Railway, the Hejaz Railway added hundreds of kilometers of railway to the empire as well. They also created credit markets linked throughout the empire. These credit markets collapsed in 1921 due to the collapse of the empire, and the credit sectors of Turkey, Iraq, Syria, Lebanon, Transjordan had to be rebuilt from scratch in the interwar years, avoiding which is certainly a very good outcome for the Ottomans.
In regards to Oil, many people here are misattributing the Ottomans. The Ottomans in 1914, were the second most industrialized power in Asia after Japan, and even then Japan had only risen above the Ottomans in 1912, after the Ottomans lost control of most of the Balkans, where most of its riches laid. The Ottomans were by contrast in 1914 shifting the private industries they had owned in Greece, Bulgaria, Serbia and Albania back to the Anatolian heartlands after 1913 and were slowly becoming successful in their endeavor (it led to the slow and gradual decrease of the deficit), and the increase in literacy rates made the Ottoman empire more and more lucrative in 1914, economically and certainly they had started to recover from the losses in the Balkans.
In terms of the Christian Minority and the Arabs, well there a lot of ways things can go, and everything hinges on the political development. IOTL, the Three Pashas were basically on borrowed time and managed to stay only due to the war. There is a reason why Enver went through with the war, as he rightly thought that the war would distract the populace from the rising agitation against the Three Pashas. The Moderate faction of the CUP, the Liberal Entente, the Ottoman Democratic Party, the Armenakan Party, the ARF, and the OPAD as well as Socialists were all plotting together to conduct a coup that would restore the 1908 constitution in its entirety that was stopped due to the war. Within November or December of 1914, the coup would have gone ahead (with the tacit agreement of Mehmed V) and would have deposed the 3 Pasha's regime. Also considering that some of the main conspirators of the coup would have been the Armenakan and the ARF parties, which were both Armenian regionalist parties, the same situation for Armenians like OTL would not exist. For the Arabs, the Arab population would remain loyal? Why? Even after the rise of Arabian nationalism and idea of an Arab empire, the Arabs called Abdulmejid II their Caliph all the way to his death. The House of Osman which had been so vilified in western countries and their homeland found refuge in Iraq, Lebanon and Syria and Transjordan, welcomed by the local population. Arab nationalism otl was completely fostered by the British, French and Russians, and even then majority of the Ottoman arab population remained loyal to the state.
Most countries with a huge natural resource: economy ratio that are not already developed and stable tend to get hit with the resource curse hard*, and odds are the Ottomans would be neither by the time their oil deposits are found.
The Ottoman economy was massively diversified though. It had textile industries, cotton industries, agricultural industries, maritime industries, a small burgeoning aviation sector, war industry, a small nascent tourism industry as well as a growing credit economy based on the service sector. Unlike Saudi Arabia or much of the gulf states for much of their history, oil was not the only resource the Ottomans had, and the Tanzimat had ensured that the Ottomans had a diversified economy that would not be dependent on one material. focusing on only oil would make around 40% of the Ottoman economy of the aforementioned sectors redundant which would have harmful effects on the entire national economy, making such a proposition invalid in the eyes of the administration.