[axegon]

Native Bulgarian here. Better candidate: yes. Good candidate: no. Yes, it is considerably simpler but it is also vastly different from the larger Slavic languages: I have friends from other Slavic countries and I've observed that Poles, Czechs, Slovaks and Ukrainians for instance have far less difficulties understanding each other than understanding me. I would assume it's the same story with Russian but I have almost 0 interaction with Russians. And even for me, it took me days in Poland to start picking up on words, phrases and sentences. Then again I can understand over 70% of Serbo-Croatian without even trying but again, those make up for a very small number of the total Slavic population.