Some folks might call this micro-managing; but then again; I can find no Scripture that states just WHAT should be said; or in what order it should be said; at a FUNERAL!
If you want to sing "Danny Boy" and talk about your feelings for the guy, a very appropriate opportunity would be:
There are plenty of opportunities, and you should take them.
But redesigning athe official public liturgy of the Church is not a private right.
I don't think any church allows you to just use their worship area any way you please.