I guess you are assuming A-H does not fall apart. Germany, A-H, and Ottomans can keep producing new replacement regiments to cover losses.
Well, Russia was out of war by OTL, so we know the answer to this one. If we assume the above CP strength, the Ottomans should greatly benefit from a friendly Black Sea. Italy will not be effective in the attack in 1919 against a stronger Austria. France probably has had enough loses so it will largely be a defensive force with more symbolic divisions helping the major Entente attacks. The UK will be up to a Grand offensive in 1919 using USA money. The USA will pay heavy losses in 1919 as we continue the learning curve against these strengthened German units that keep showing up. I suspect by 1920 or 1921, only the USA will have the strength to attack, and will be showing 1917/18 like issues in manpower and finance that the Entente would have shown without USA entering the war.
Now, the true answer is that it all depends on what the POD was that make the CP stronger. There are a lot of possiblities, and so you can get lots of answers. Examples would be that a failed Brusilov offensive gives a lot different result that Austria running War Plan Russia in 1914. And these are different than Italy not entering the war on some internal Italian political issue.
