Great post! Is it not required? "From here if you ask for anything IN MY NAME it will be given". I agree, no requirement, but if the aforementioned is correct, which it is, wouldn't we pray that way? "Pray in my name, receive this promise", it follows that promise doesn't apply if we don't.
When I pray, I say "I come to you Father IN THE NAME OF JESUS", not as magical words, but it is HE who bridged the gulf between the Father and man, He is the door, He is the reason we are righteous, He is the reason the Father forgives our sins. If I were to put in a vote I'd say it's crazy to pray in our own, sinful self when a KING says we can pray in His name.
If we were going to a Kings palace to ask the King for favor, would we ask in our name, or ask in the Kings Son name? Just my 2 cen@s