i finally made a 2500 all comers

Here goes.
Slaughtermaster, level 4 death, fencers blades, glittering scales, greedy fist

BSB, heavy armor, sword of striking, enchanted shield, talisman of endurance

Butcher, level 2 gut magic (yes, I will always call it that), crown of command, dragonbane gem, great weapon

8 Ironguts, FC, standard of discipline

90 gnoblars, trappers

6 leadbelchers, bellower

3 x 1 sabretusks

3 x 2 mournfangs, heavy armor, ironfists

2 ironblasters

I'm still uncertain about the butcher kit.  I love the SM and BSB kits with the guts unit + the gnoblar horde of 90 of something and the cannons. I'm trying to put the most cohesive army around that core that I can.
I hope the huge gnoblar horde keeps this list from being too cookie cutter, plus if you have 90 painted gnobs, you hafta use em!

why not split your gnoblars into 2 units, they'll add more drops during deployments and still tar-pit a unit for a turn or 2.  Also, what's the rationale of GW on butcher, unless you expect him to go into combat.  I opted to get ironfist at least for a 6+ parry and 6+ armor save, at least you get 1/3 chance of saving a wound in CC

GW on butcher is unnecessary. I was just thinking he will tytpically be fighting from second rank. I'm telling you guys- I used to be a fan of the 2 big, but not massive, units of gnoblars. Now, I'm sold on 90 of something. Park em and forget about em til the right time.

GW on butcher is unnecessary. I was just thinking he will tytpically be fighting from second rank.

He gets to use his GW from the second rank.  It's a 9 pt upgrade that makes you hit like an irongut instead of a bull.

I forgot to ask this in the original post.  What do you think this army's biggest weakness is and what is it most susceptible to?

I think its a solid list. The only weakness I see is that it has 0 flaming attacks. Maybe somehow sneak in a standard and flaming banner on the mournfang?

Yes, I have thought a lot about that.  I also considered a unit of 3 scouting poisonous maneaters with brace of handguns and the flaming banner.  If I had a choice, I would like to wound those regenerating units in the shooting phase if possible. That maneater unit is 213 dang points though (sadface).