On paper they are one of the best long term 'builder' teams with access to GSPM on their standard marauder lineman. With big guys taking S regular and GAPM on a doubles, it just takes two doubles (about 3 seasons) for a Block, Tentacles monster big guy. The slow build for sure; if you're in it for the long haul to build or like your big guys, it's a fun team.
That is getting quite a bit of luck. Two double skills on one player. I find even the big guys die on chaos pact (all of mine did on my pact team). B league is a scary place.
the biggest problem is the linemen have nothing. GSMP access seems great. You will have visions of linemen with all these funky skills but it takes forever and you are often just trying to survive. That usually means taking block gaurd or making a killer (Claw, MB, Piling On, etc.) And then you get to the magical third skill and the player dies or gets gimped. It is also really hard to level up linemen in B league, so hopefully C league goes well for you.
I also found they are not as bashy as they seem. True bash teams are better as they are reliable. Killer blitzers are better than big guys. Block is the best skill for a reason, and you have none of it.
I do not mean to discourage you Rude Slay, just to make sure your expectations are realistic. I do think the team idea is fun and it is a great perpetual team with tons of modelling fun if that is your thing. You will most likely be middle of the pack.
I disagree with Kavin about the Skaven. I would play with one. The 7 move is valuable and he makes a good blitzer. Wrestle / horns is a good combo on him. Just don't be surprised if he dies a lot.
My last piece of advice is to look at the database of exiting teams. See how well the players have developed vs. the games played. Real teams are the best to look at if you want to get a gauge of how a team develops.