I see a few issues with this list:
Bloated command squad: Kell & the Master of Ordinance are just not going top cut it here in my opinion. Kell isn't really doing much for the army as a whole, he's more of a platoon army guy really, he is also a points dump. The
MoO isn't very effective and by cutting him and kell you free up enough points to get yourself something nice.
Veteran squad power weapons: These... won't help you. If your vet's are being assaulted you want your opponent to sweep you immediately so that you can shoot his attackers right away, preferably with your executioner.
Basilisk: If you like them, cool. They are not, however, good. This is my opinion, of course, I just feel that if you can cut the last section of the barrel off and call it a colossus you will be a much happier guardsmen