Drakia has won territories (Arabia and Anatolia), as well as the Russian client. Which is good as it brings even more manpower and resources to the Societists.
But it has also gained a large land border with Indian Persia (and with the Draka at the gates, I suspect that Persians will become VERY loyal to their new Indian overlords), plus the Persian Gulf coast which directly faces Persia. As well as a quagmire in Turkey and Arabia. Especially Turkey, which had prepared this war (including the guerilla) for decades.
Moreover, North Africa was hit hard by the Rexist air strikes. Rhomania and Britain would be even worse off.
In the next war against Pan-Europe, the Societists might win (through sheer numbers and industrial weight, combining Drakia, Rhomania and Russia), but it would be a total pyrrhic victory, with Europe becoming a giant quagmire (dozens of Vietnams), and dozens of millions of losses in the process, and North Africa and Rhomania getting bombed to hell again.
And the Indians would likely use the occasion to invade Drakian Asia.
The Drakan victory isn't as good as it looks.
And speaking of Britain... well, the British have gained nothing from this war. Nothing, except the death of hundreds of thousands of conscripts deployed to the Russian (and then Irish) front as well as England getting bombed.
The British population now knows first hand that the next war, a Societist Britain will be sandwiched between Pan-Europe, France and Ireland (with US bases). In other words, a Societist Britain is guaranteed to get bombed and blockaded even worse next round... and can hope for little gain.
So, the Societist government in Britain should be very shaky now...