So you also think that the USSR was willing to go to war with the Western Allies in 1939?(a big) IF the BEF arrived in Poland it would have to be through Romania? cannot picture RN allowing themselves to be trapped in Baltic scenario?
(how well Romanian route would work is questionable but not that it would be used)
still think it ends with Romania divided like Poland, the Soviets attention focused more on Black Sea access due to scenario, possibly Turkey more in their sights than Finland? they had IOTL wanted base in Bulgaria? maybe here they would have plate full with more of Romania to occupy and would have naval base on eastern shore of Black Sea?