An interesting question regarding the timeline is what will happen to the African divisions? The 11th East African is already formed and participated in the last campaign. However what will happen with the 2 West African ones? I don't see the British sending them in the ETO. So, will they not formed at all and their equipment send elsewhere? Will they, along with the 11th, become garrison troops in Palestine, Iraq, Persia? Will they be sent in South East Asia? The British have now a lot more options on what troops to train and equip and where to deploy them.
That begs also the question on the status of the Indian Army. In OTL with the catastrophes in Malaya/Singapore and Burma, its development was dealt a severe blow. The rapid expansion was problematic as it was and the loss of so many formations in their entirety pushed the scedule back for months if not a couple of years. There are various reports that in 1943 the quality of a lot of Indian formations was low. But in TTL, the Indian Army has known only victories, has a lot more experience, with surviving veterans to spread the experience around. Needless to say that officers and NCOs that became POWs are kicking around. So, with no major disasters, even with hard fought battles, as the ones the 5th Indian division had to endure, it seems that by 1943 the Indian Army can field at least 16 infantry divisions and 1 or 2 armored ones. My rationale is as follows: i) 2 Div were formed in 1939, ii) 5 in 1940, iii) 5 in 1941, iv) 4 new ones from scratch in 1942 after the Q1 disasters. At the same time 2 armored ones were formed that later on were merged into 1. Of course more independent brigades existed at the same time. Last but not least, with no Bengal Famine and less internal strife, less troops are needed for internal security. The 16 infranty divisions is a conservative estimation since its basis is not a larger army but a more experienced one that still has the OTL surrendered formations.
In OTL the Burma Rifles provided 14 battalions throughtout 1941, including 8 first line ones. Also, the local Malay Settlements troops exist in TTL for security/garrison purposes. So, more "light" brigade-size formations for garrison purposes.
Taking all the above into account, it seems that the Raj can have an even bigger contribution to the war effort.