Generalist work is expected - your development can take a backseat to whatever your current client needs.
Slalom sells you on a vision - it's a great vision but it's not always the reality of the work you'll do on a daily basis as a consultant. 50% of the time it'll be staff aug work disguised as "strategic consulting". Usually there's room to advise the client strategically - Slalom puts the onus on the individual to "make the role what they want it to be."
Don't complain about the work ("opportunities") given to you - it's not the "Slalom" spirit.
Promotions center around sales. If there are other paths to leadership they are not clear. Feels like an old boys club/popularity contest. You will work with leaders that you're more skilled then.