Mavenification of Seam 2.x projects via the M2 Facet contains lots of hardcoded stuff for dependencies / layout / everything.

We decided Seam 2.3 conversion support was out of scope of such conversion mechanism, as it would have required significant refactoring of the existing code for little to no benefit.

As a consequence, the Seam part of the M2 conversion will be restricted to Seam [2.0, 2.3).

The preferred way of converting Maven projects is to right-click on project > Configure > Convert to Maven.