1. The Yerushalmi asks under what circumstances can Avodah Zarah and Gilui Arayos be considered "kalos" (as opposed to "chamuros"), and it answers, "when he did not do Teshuvah but died with afflictions." From here we see yisurin are mechaper even without Teshuvah.
2. The Yerushalmi says that in the case of a majority of mitzvos, the deceased inherits Gan Eden, while in the case of a majority of aveiros the deceased inherits Gehinom. This seems to indicate that mitzvos and aveiros cancel each other out, not like the Gemara in Sotah 21. Tzarich iyun.