you can add a little acid to the water such as lemon juice, white vinegar or cream of tartar, or tartaric acid. this will also ensure no re-crystalization.
glucose also leaves the sugar a bit more plyable in my experience- perhaps...
whip your egg whites and sugar over a double boiler untill warm and the sugar is melted. do this in the bowl you are going to whip them in (IE mixer bowl)
add the vanilla and whip on the mixer with the whip attachment until fully...
You are going to need to add more Butter or fat to bring it together.
Cream cheese has moisture that has thrown your formula off balance.
Try an olde time cream cheese with butter, powder sugar, vanilla and lemon juice for the...