Well, just look at their business model: revenue growth and steady revenue stream comes from larger and larger multi-year delivery, transformation, outsourcing, etc. deals with larger and larger teams (stack 'em high and wide). So you might have a project with 100 ACN bodies and only 1 'client engagement leader'. So much for opportunities for building BD/sales skills, shaping work, engaging with senior client stakeholders... Until you get to mayeb 2nd/3rd year SM level you won't even be allowed to talk to heads of level clients. This volume-based model bring with it other things such as larger teams to lead and manage (and related complexity - you mentioned an A2 leading 6 people...I think A2s easily beat that these days), bigger variance in staff quality (not really up-or-out...just hang on and you'll get promoted...everyone blends into a sea of mediocrity), much less 'throw you in the deep end and see if you sink' and more reliance on industrialisation, methodology, tools, etc. to assure quality and reduce write-downs (the scale of which are increased due to scale of engagements). In the past ACN probably hired the cream of the crop (a few top talent), threw them in, kept the ones that swam, worked them 16 hours a day which meant within 2 years you had the combination of high intelligence and equivalent of 4 years experience (then rinse and repeat). Now they hire lots of pretty good people, stick them in random roles, move them to another client if they don't repeat, let them work from home 2 days a week (refer to example of our dear friend Aces), which means 2 years later you have a bunch of mediocre people with 2 years of experience. Then rinse and repeat.