The decision of whether or not to stay or go, should in my opinion be a matter of prayer and talking to the pastor.
Seeing how the Church claims to be Reformed, perhaps you could humbly ask the pastor why he uses "Arminian" language spoken by the pastor ("making a decision for Christ").
Some pastors actually welcome people who respectfully question what he says. It tells them that people are actually listening.
What you have discribed sounds like a pretty good Church, at least when I conpare what you said to the Churches in my area.

Tom