So here's my insights:
I agree with what you found on glassdoor. Its a good ballpark. Compensation will be ~30-40% lower than MBB and at par or slightly above BIG4. Please remember there is a broad range at every level and this becomes broader the more senior you go (Manager & above). There is room to negotiate sign-on bonus and other perks. Overall, from my experience having worked at Accenture UK, its a good pay master with great benefits but NOT at MBB level.
Its not a tech consulting firm anymore. The breadth and scale of Accenture has made it one of the most sought after companies in the recent 5-10 years. It now plays in Strategy, Digital Transformation, Marketing etc. Just check out Gartner/Forrester rating and Accenture pretty much leads all qudrants even beating MBB in Digital Transformation expertise for example.
Check out these links:
Note that Accenture Strategy is not at the same level & reputation as MBB, so you need to play the wider Accenture brand in your story i.e Accenture offers exposure to all those areas where MBB dont play giving you more experience in e2e business problems. However, they are fighting hard and investing a lot to boost the Strategy practice. I am also aware of many ex-MBB partners who have joined the Strategy practice in DE in past few years.
Overall, good in my view but not the same level of pull as MBB. Its a global and well known brand, but you have to work a bit harder on your story & exit. Get this right and you can make make big jumps. I did it and so have many others.