Yes, increasing stats beyond 15 provides further benefits along the same lines that they provide up to the soft-cap for attribute points.

EDIT: The big question is not whether getting more of your primary attribute is good, as it always is, but whether you are better served by focusing on the primary attribute or on increasing the hitpoint/AP generating stats.

Last edited by Peter Ebbesen; 09/07/14 04:18 PM.
When I said death before dishonour, I meant it alphabetically.