Input to improve Imperial Stout Braggot

Seeking Advice Improving Stout Braggot

I recently brewed my first attempt at an biab Imperial stout braggot and finally cracked it open a month after bottling. Overall it tasted good and is drinkable but needs to be refined a little, I felt as tho it came out a little too sweet and lacked any bitter notes.  The recipe I formulated was for a 1 gallon brew as follows:

US 6-Row 1lb
Crystal Rye 6oz
Carahell 4oz
UK Dark Crystal 4oz (70L I believe)
Midnight Wheat Malt 2oz
Buckwheat Honey 2lb
Sovereign Hops Pellet 1oz (30 min boil)
Lallemand - LALBREW® VOSS KVEIK ALE YEAST 1 package

I am thinking of swapping Carafa III for the UK Dark Crystal. I am open to other suggestions and  thoughts on why this plan might not work out.

What was the proportion & type of honey?

Buckwheat honey 2lb, and this was a 1 gallon brew. Totally forgot to mention both of those to.