I don't use kits, but I do use my house amber recipe for both pumpkin and holiday spice. I'm brewing the pumpkin this weekend, and I will indeed use canned pumpkin. In the summer I make a couple batches of the same amber without spices or additions..
When I brew the pumpkin or holiday spiced I drop the IBU's to about 20. When I just brew the amber without additions I up the IBU's to about 25-27..
Bier war sein letztes wort dann trugen ihn die Englein fort...