Well I believe the big drawback to calvinism is teaching that a saved person WILL do good works!
That is not once saved always saved teaching.
Once saved always saved teaching is that a saved person MAY do good works if they rely on the Holy Spirit after being previously given eternal life to begin with!
Therefore there is nothing binding on their walk with Jesus to do with whether they have eternal life or not.
That is truly 'OSAS'.
I believe 'perseverance of the saints'.. should be 'preservation of the saved'
I don't see anywhere at all in the bible that teaches that a saved person WILL do good works and WILL persevere until the end.
'Enduring to the end' is THE faith. Not the trust in Jesus that got someone converted to begin with.
Eternal salvation is not.. I am turning from this sin and that sin.. therefore I must be saved.. which is in a hidden way what many people who follow calvinism believe. Paul Washer pretty much teaches this. It's Lordship salvation.
Not all calvinists will teach this.. but if you follow the TULIP to it's logical conclusions.. it is pretty much Lordship salvation.
Eternal salvation is what happened to the thief on the cross and the publican...
The thief -- trusted in Christ and was given a place in heaven.. no 'perseverance' required or 'put in' the person.
The publican--
Luk_18:13 And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner.
OSAS does not equal Calvinism!
OSAS does NOT require 'perseverance until the end'.
Of course there is going to be fruit from someone being given eternal life.. but that doesn't mean they will 'endure to the end'.
END OF RANT