I find that groups are useful in controlling what you want specific users (or user groups, if using AD) to see or have access to. If they all have the same access but need different views you could use the AD groups for the accounts.
Each OU could be set different to Home Page View. Manage this in your account settings per individual user or each user group. This will change the first page that loads when a user logs into the web interface.
You can also create more / new summaries and add links to your menu bars.
I find another way to control(or suggest) what some people view is to fashion your menu bar's with the things that you want them to look at normally.
That way you are not the only one watching key elements as others log in and out. Having the team see items of importance I find helps with the pro activeness of troubleshooting.