First : Greetings from another "Bögli" on the Developer Exchange.
I don't think there are other issues. But, like Dan said, the property node will be much slower. This is because it will force LV to switch to the user interface every time you read the property.
I have just made a little test to give you some figures. Simple for loop with 1000000 iterations in which the value is read.
Local variable = 15 times slower than Terminal
Property node = 653 (!!!) times slower than Terminal
If performance is an issue, the property node is not the way to go !