I'm siding with the wrong people because I disagree with you and those you agree with - have you ever looked into the debates and the changes in scholarship that have been taking place over even the past 50 years?You are not lining up with others whom I have known who also exegete.
You are siding with the wrong people. That's the problem I have with you.
Looking at Dallas Theological for example - in the mid 20th century it looks like their Greek department was not teaching permanence in the perfect tense but had wording that their theology department took and made into permanence in support of their security theology.
Later in the same century Greek scholarship pushed back against using the perfect tense to speak of permanence and it looks to me like Dallas has quietly realigned their views on security to not be grammatically based but doctrinally based.
Point being, though you can certainly find those who may agree with you, the bulk of scholarship does not agree with you and you're resting in a system that has left you in its grammatical error.
The question you should be asking is whether or not the grammatical correction caused a cessation in the overall theological view of eternal security.