This is all common sense - what is the source of your confusion?
I still can't follow your logic. We are talking about an ATL in which Germany does not apply the "Schlieffen Plan". If I understand you correctly, you are making the following assumptions in this:
- "France will violate Belgian neutrality for an attack on Germany."
AFAIK Joffre did not get permission for this because his government did not want to damage relations with Britain.
- "If the British do not support the Russians in the war against Germany, the Russians will denounce the Anglo-Russian Convention."
Why will the British be blackmailed with this if it was uncertain anyway that they wanted to renew the Anglo-Russian Convention in 1915?
- "The Germans will destroy the Russian army."
This belief did not prevail in 1914. On the contrary, the expectation was that the Russians and French would win because together they had a much larger army.
- "If the French and British do not attack Germany (through Belgium), the Russians will seek rapprochement with Berlin."
That means a rather big diplomatic defeat for Russia, because then they will have to throw Serbia under the bus. And why would the Germans go along with this when the Russians just wanted war with Germany? This comes across as very unreliable.
All in all, these assumptions are rather speculative and debatable...