
The content tab layout would be used for the Welcome, Documentation, and Support tabs. Each tab includes:

The Add-ons tab would have a special layout that simply lays out the installed add-ons in a grid with relevant links below each add-on title.
The scenarios below define the state of the tabs depending on how Give and its add-ons are activated.
*In the event that only add-ons are activated with an existing Give installation, then the Add-ons tab would be selected by default because it is assumed the user has already seen the welcome screen.
Rather than scraping the entire welcome screen, I'm going to scale this back to simply take care of the original problem of excessive banner displays when activating multiple add-ons. Here's what I propose:

Same functionality, the only change is that I would like to now pull the add-on description from the plugin's details to display additional text below the main banner title.
A tabbed interface displays on the left hand side with the same layout within the tabbed contents per the banner. The same content appears. Dismissing the notice removes it from the screen.

Notes:
This should remove the blocker for you @emgk - please let me know if you have any questions.
Most helpful comment
Design Decision
Rather than scraping the entire welcome screen, I'm going to scale this back to simply take care of the original problem of excessive banner displays when activating multiple add-ons. Here's what I propose:
Single Add-on Banner:
Same functionality, the only change is that I would like to now pull the add-on description from the plugin's details to display additional text below the main banner title.
Multiple Add-on Activations:
A tabbed interface displays on the left hand side with the same layout within the tabbed contents per the banner. The same content appears. Dismissing the notice removes it from the screen.
Notes:
This should remove the blocker for you @emgk - please let me know if you have any questions.