If anything, this version would lean more towards the majority view being that one can lose their salvation, but that they wished to explore it more fully before teaching it "with the full persuasion of [their] minds." (emph added)
In reality, this is hardly different that a Reformed church's proceeding to excommunicate wayward members. then there is the argument that maybe those who reject their faith were never 'Saved' to begin with. Such a question is limited to either the Reformed position or a more arminian one.
Huh? That has nothing whatsoever to do with excommunication. As far as the issue of apostasy, while the Arminian view in the case of the Remonstrants was vague, the Reformed view was quite clear.
The 'P' of TULIP is pretty much the only part in which I am in agreement, it would be unfair to say that all the Remonstrants agreed that one can lose their salvation. the very words of the Remostrants clearly indicate otherwise, even if some of them did think one could lose their Salvation. If the majority was of that onpinion, the wording would have been significantly different.