The world commitments mean that until the fuel oil storage around the Empire/Dominions is improved (just as in OTL), coal fired is going to remain 'useful' but ought to be solved quickly with the increased funding available.
One of the bigger expenses in building out Singapore was the provision of tankage and purchase of the reserve of oil anticipated to be needed once the main fleet is deployed to the Far East. Even with Persia and the Gulf States oil in British hands, I foresee that the RN competes with the civilian economy for oil under wartime usage, something that worsens with time as both the navy and the economy shift from coal to oil. The UK and the Empire both are vulnerable to a disruption to oil supplies. This worsens the need for cruisers to patrol the sea lines, increases the commitments for both troops and aircraft to defend choke points, Sheikdoms and the Middle East. On a side note how interesting the conundrum of DEI oil, the British half of Shell would prefer Japan to buy the oil, deepening its hold over Tokyo, yet how interesting if it is sold to Germany and entangles her supply over great distances, vulnerable to London. Oil is the Achilles heel for the CPs generally, Germany in particular.
I might suggest the RN sees the value in moving to RAS versus tankage at fixed bases, the greater part of both rationale and value for the Empire is those bases, but they are likewise a yoke, with RAS the RN can move, concentrate and disperse, going to thee place rather than having a place from which to go. It might oddly undermine the strategic value of many outposts and recapture the expenditures for ships useful everywhere as opposed to bases useful locally. On the flip side, Germany might get out to sea by means of RAS rather than basing, but perversely giving her colonies chains her to the cost and commitment, mirroring the RN, making her more vulnerable despite the flags on the map.
Longest term I will argue Germany gets interested in nuclear power not for her domestic needs, but as naval warship propulsion, on paper she should be one of the first to swallow the high costs to free herself of the anchor of oil. That means German warships in the farther future will be very much all about quality, they will be gold plated priced, fewer in number and better be more capable per ton than anything else, these are precious eggs. Just as the Kaiser's ghost will fawn over. I do love how necessity sometimes circles us back to the past and return the memes to vogue.