I think the matter with works that the Orthodox reject from Trent is if Christians who repent from sin but fail to perform their penance they are given go to purgatory. The correct Orthodox view is that works must attend faith or else faith, being alone, will die.
Some Orthodox reject the teaching of the toll-houses after death simply because the teaching speaks of your guardian angel carrying a bag full of the merits attained in life by good works and using it as money to pay off the demons at the toll-houses for other sins that were not repented of. Some Orthodox on this forum have even said as much! Well, the teaching is NOT un-orthodox, merit can be used to pay off a toll-house that is assigned to a sin that the one that died did not repent. The tendency to reject this concept, I think, comes from a prejudice against anything that sounds too Western-minded.
It should be understandable that Protestants who convert to Orthodoxy might like to continue to believe something as close as possible to the fundamentalist Protestant teaching of the eternal security of the believer, as this teaching when believed gives such a believer a great sense of peace. To believe in the eternal security of the believer is to trust only on the merits of Christ and not in any personal merits. I do not believe that this teaching is wrong either. It only becomes wrong when it is taught as it is either this or that and not that there is a way that both can be true. The early Church rejected a book from the canon of scripture known as “The Apocalypse of Peter” because it was thought that it taught universal salvation. The fact is though that 99% of it taught of all the pain and torture that unrepentant sinners will go through after death, but then it concludes that in the end all who believe will be delivered and saved, not all will be delivered and saved, but all who believe will be delivered and saved. So really it taught not universal salvation, but rather that in the end all who believe will be saved. The picture painted by The Apocalypse of Peter really sounds alot like a teaching about purgatory. Of course this is a teaching rejected by the Orthodox AFTER the East-West split. But I personally accept it because I’m convinced such things were “Orthodox” before the East-West split. Not everything that was written, but was not canonized, should be totally rejected because often it speaks of customs or beliefs that were believed and passed down by Holy Tradition.
This issue is not any were near the degree of a problem in the East as it is in the West. The East is far more willing to accept things in terms of them being mysteries of the faith, whereas the West over-rationalizes everything.