Problem:
The default install of Abiword comes without .odt support (and misses many other formats). The user has to install the abiword-plugins package to work with .odt files.
If I had not explicitly sought for Abiword's .odt support I would have reverted to OpenOffice.
Spending extra time to make Abiword compatible is quite a high barrier for normal users (=users that expect an application to work out of the box).
Solution:
Abiword should support .odt by default. Either recommend to install the abiword-plugins package when installing Abiword or integrate the plugins into Abiword (means they cannot be removed).
At least integrate .odt support somehow BY DEFAULT.