Yes. There are some paradigm shifts.
Let me see if I can answer your question first before I explain the shift.
To view a table there are three different viewers, each with a little different behavior.
When you double click on a table in the Object Explorer it opens up a table viewer on the right. This is a single table viewer. When you change connections it will not create an additional viewer, but display the currently focused table. This sounds like the behavior that you do not want.
If you go to the Tools Menu and choose Database Browser you will get an window that has an Object Explorer and Viewer together in one window. Every time you click on this menu you will get a new Database Browser and each can be using different connections. Or you can change your connection to that window by using the drop down in the bottom right of the application or connection toolbar. This window is very similar to Toad for Oracle’s Browser.
The Object Details window is a dockable window that can be used to browse table data while viewing other windows such as an editor. To have multiple tables to different connections contained in the same Object Details window, use the 'Send To --> Object Details menu, available from the right click menu of the Object Explorer.
When we designed Toad for Data Analysts we tried to create an uncluttered, left to right work flow. To do this we created a set of defaults that do the following:
Contain the most commonly used tools in one docked window. Connection manager, object explorer, and project manager. We call this window the navigation manager and set it on the left.
The most common work flows are grouped into the following groups: Understand the database, Query the database, Build a report on the data, and the automate the repetitive tasks. By default only one group can have focus at a time. During that time only the windows in the work group are displayed, the others are hidden. This keeps the clutter down but if you are not used to it you might wonder where the windows went. Of course all are available from the window menu.
The object explorer drives the single windows on the right. Each of the main windows have a Wizard bar at the bottom to create a left to right workflow. The last action on the wizard bar represents the next step in the work flow. IE: When you are in the Understand group double clicking on a table will bring up a Table Viewer or an ER Diagram, depending on your settings. When in the Query group, double clicking a table will add to a Query Builder, and so on.
New users try the default layout at first. They usually turn off the Quick Guide. Most like the left to right work flow. Many who use multiple connections go through the Custom Configuration Wizard and use a combination of settings. IE: Keep the Wizard bar, but turn off Hide windows per connection or Hide windows per group. I would suggest you give this a try sometime down the road when you are not pressured to get some work done. You may like the conservation of work space. Or find some new combination that works for you.